IN THE COURT OF APPEALS OF IOWA

No. 17-1833

Filed November 21, 2018

STATE OF IOWA,

Plaintiff-Appellee,

vs.

ISAI SANCHEZ-CASCO,

Defendant-Appellant.

________________________________________________________________

Appeal from the Iowa District Court for Scott County, Mark D. Cleve, Judge.

Isai Sanchez-Casco appeals his conviction for operating while intoxicated, 

third offense. AFFIRMED.

Christopher Raker and Stuart G. Hoover of Blair & Fitzsimmons, PC, 

Dubuque, for appellant.

Thomas J. Miller, Attorney General, and Louis S. Sloven, Assistant Attorney 

General, for appellee.

Heard by Vogel, P.J., and Vaitheswaran and McDonald, JJ.
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VOGEL, Presiding Judge.

Isai Sanchez-Casco appeals his conviction for operating while intoxicated

(OWI), third offense. He argues the district court abused its discretion in allowing 

expert testimony on intoxication, and he appeals the denials of his motion for 

judgment of acquittal and motion for new trial. We find the State presented an 

adequate foundation for the expert testimony. We also find the verdict is supported 

by substantial evidence and the court did not abuse its discretion in denying his 

motion for new trial. Therefore, we affirm.

I. Background Facts and Procedure

At about 1:30 or 1:40 a.m. on May 16, 2017, Isai Sanchez-Casco parked a 

black Chrysler next to a gas pump at a convenience store in Davenport. He 

entered the store, picked up a bottle of beer, and proceeded to the counter to make 

his purchase. The clerk who worked behind the counter at the time asked for his 

identification. He responded by asking her for a cigar. She again asked for his 

identification, and he asked, “If I don’t give you my ID, will you be arrested?” He 

then gave her his identification, and she completed the transaction. He left the 

store by kicking the first exit door and then the second, opened his bottle of beer, 

threw the cap in the parking lot, put the open bottle on top of the black Chrysler, 

and began pumping gas. The clerk called the police after witnessing this because 

“it’s not normal to open up a bottle of beer and put it on top of your car while you’re

pumping gas. It’s just not safe. And open container, you know.” When SanchezCasco noticed her on the phone, he extended his middle fingers at her and 

“decided to do his own display around the parking lot for a minute” by “driving 

backwards through the whole parking lot.” He then parked, reentered the store, 
3

called her a “motherf**king c**t,” threw something like plastic silverware at her, and 

“stormed out again.” Finally, “[h]e did a tour around the parking lot again, . . . 

proceeded to get out and throw a coffee mug at” the store window—shattering the 

mug—and drove away. The encounter was captured on store surveillance video.1 

On cross-examination, the clerk testified she had worked as a bartender for over 

twenty years, and she did not smell alcohol on Sanchez-Casco or otherwise think

he was intoxicated when he was in the store. 

At or around 1:42 a.m., Sergeant Janet Martin with the Davenport Police 

Department received a call regarding the clerk’s complaint. The call included 

descriptions of Sanchez-Casco and the black Chrysler with a partial license plate 

number. Sergeant Martin was several blocks away from the convenience store at 

the time, and she began driving toward the store hoping to encounter the described 

vehicle along the way. As she neared the vicinity of the convenience store, she 

noticed a black Chrysler with a matching partial plate parked at a second 

convenience store across the street from the first store. She stopped to 

investigate, and she found Sanchez-Casco walking out of the second store. She 

did not see anyone with him or near the Chrysler. She approached SanchezCasco, patted him down, and searched his pockets with his consent.2

 She found 

a key to the Chrysler in his pocket. She noticed he was swaying, had a strong 

odor of alcohol coming from him, had bloodshot eyes, and was exhibiting erratic 

behavior. Officer Brenton Joyce soon arrived, and he observed Sanchez-Casco

 

1 According to time stamps on the store surveillance video, Sanchez-Casco first entered 

the store at 1:38 a.m. and drove away from the store at 1:45 a.m. 

2 According to surveillance video from Sergeant Martin’s police cruiser, this interaction 

occurred at 1:50 a.m. 
4

display erratic behavior, bloodshot eyes, slurred speech, impaired balance, odor 

of alcohol, dilated pupils, profuse sweating, and nervous tics. 

Sergeant Martin called Officer Jennifer Brewer to the scene because of her 

expertise in recognizing alcohol and drug intoxication. Officer Brewer testified all 

officers are trained to detect intoxication generally and can perform standard field 

sobriety testing but they call her when they suspect intoxication by something other 

than alcohol. To identify intoxication and the category of drug or alcohol causing 

it, she uses a twelve-step process, which involves “looking at the totality of the 

circumstances,” including “appearance, behavior, moods, and then, the 

psychophysical testing.” 

Officer Brewer approached Sanchez-Casco while he was seated in the back 

of Sergeant Martin’s police cruiser. She testified about their interaction:

When I opened the rear door, I could smell the odor of alcohol 

right away. . . . As I was speaking to him, he would say things that I 

just couldn’t understand, and then he would say, “Does that make

sense?” And I was like, “Not really.”

. . . .

I couldn’t understand because his speech was slurred and he 

was, just, running words together. I couldn’t understand what he was 

saying. He was very, very talkative, he spoke quickly, and his 

movements were exaggerated. He was irritable. His speech was 

the thick tongue and slurred. And then, the odor of alcohol was 

stronger when he was speaking to me. 

. . . .

After I spoke with him, I believed that he, too, was not only 

under the influence of alcohol, but also under the influence of a drug. 

As I was speaking with him, he—he continuously had tics, that he 

kept, you know, moving and jerking. He, at one point, started yelling 

and screaming at me and was telling me to f**k off, things like that. I 

told him that I believed that he had been driving under the influence 

and I asked him if he would perform the three standardized field 

sobriety tests for me at this time.

. . . .

I asked him to perform the HGN test, and he said, “No. F**k 

that.” I asked if he would perform the walk-and-turn test. He said, “I 
5

don’t have s**t to do. You don’t have no probable cause, so f**k 

you.” I asked if he would try the one-leg stand test. He said, “Nope.”

She then asked him to provide samples of his breath, blood, or urine, and he flatly 

refused to provide any samples.

3 Due to his total lack of cooperation, she could 

not continue the twelve-step evaluation process. The officers placed him under 

arrest for OWI. 

On September 5, Sanchez-Casco proceeded to trial, at the conclusion of 

which the jury found him guilty of OWI. Following the verdict, he stipulated to 

having two prior convictions for OWI.

4

 Accordingly, the district court convicted him 

of OWI, third offense,

5 and sentenced him to a term of incarceration not to exceed 

five years plus fines, fees, and surcharges. He now appeals, arguing the court 

abused its discretion in allowing Officer Brewer to provide expert testimony on his 

intoxication. He also appeals the district court’s denials of his motion for judgment 

of acquittal and motion for new trial.

II. Expert Testimony

Sanchez-Casco appeals the court’s decision to allow Officer Brewer to 

provide testimony as an expert witness on intoxication. We review evidentiary 

rulings, including the admission of expert testimony, for abuse of discretion. State 

v. Tyler, 867 N.W.2d 136, 152 (Iowa 2015). “Iowa is generally ‘committed to a 

liberal view on the admissibility of expert testimony.’” Id. at 153 (quoting Ranes v. 

Adams Labs. Inc., 778 N.W.2d 677, 685 (Iowa 2010)). A qualified expert “may 

 

3 According to surveillance video from the police cruisers, Officer Brewer asked SanchezCasco to provide samples at 2:08 a.m. 

4 Sanchez-Casco does not challenge his stipulation to having two prior OWI convictions. 

5 OWI, third or subsequent offense, is a class “D” felony. Iowa Code § 321J.2(2)(c) (2017).
6

testify in the form of an opinion or otherwise if the expert’s scientific, technical, or 

other specialized knowledge will help the trier of fact to understand the evidence 

or to determine a fact in issue.” Iowa R. Evid. 5.702. “An expert may base an 

opinion on facts or data in the case that the expert has been made aware of or 

personally observed.” Iowa R. Evid. 5.703.

The State explored Officer Brewer’s qualifications at trial. She has been a 

police officer for over twelve years and participated in over 500 OWI investigations

in that time. In addition to standard law-enforcement training, Officer Brewer 

became a standardized field sobriety instructor in 2010, which requires 

demonstrated proficiency, a one-week course, and recertification every three 

years. As a standardized field sobriety instructor, she teaches other officers how 

to conduct standardized field sobriety tests. She has certification in Advanced 

Roadside Impaired Driving Enforcement, which teaches additional field sobriety 

tests. She is also a certified drug recognition expert, which requires three-andone-half weeks of state-level training to achieve the state certification and an 

additional week of national-level training to achieve the national certification. As a 

drug recognition expert, she is trained to recognize intoxication from seven 

different drug categories. She uses a twelve-step process to recognize intoxication 

and the substances involved. The record demonstrates Officer Brewer is wellqualified to opine on intoxication from alcohol and other substances. See Iowa R. 

Evid. 5.702. Therefore, the court did not abuse its discretion in admitting her as 

an expert witness on intoxication. 

Nonetheless, Sanchez-Casco argues Officer Brewer did not provide 

sufficient foundation for her expert opinion to recognize intoxication from non-
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alcohol substances without psychophysical testing.6 He notes she extensively 

discussed her training in psychophysical testing, but she never performed the 

testing. However, Officer Brewer testified about her considerable training in 

recognizing intoxication from both alcohol and non-alcohol substances. She 

testified about the twelve-step process she uses for recognizing intoxication, which 

includes evaluating the subject’s behavior and appearance in addition to 

performing psychophysical testing. She used her training to conclude he was 

intoxicated based on his appearance and behavior, noting “he continuously had 

tics” and he kept “moving and jerking.” Accordingly, she provided a sufficient 

foundation for her opinion that he was intoxicated—from alcohol, other drugs, or 

both. While his behavior prevented her from performing the psychophysical 

testing, she relied on other factors in reaching her opinion, and the absence of 

testing alone does not render her testimony inadmissible. See Tyler, 867 N.W.2d 

at 153 (“A lack of absolute certainty goes to the weight of the expert’s testimony, 

not to its admissibility.” (quoting Johnson v. Knoxville Cmty. Sch. Dist., 570 N.W.2d 

633, 637 (Iowa 1997))).

III. Sufficiency of the Evidence and Weight of the Evidence

During trial, Sanchez-Casco orally moved for judgment of acquittal, and the 

court denied the motion, finding substantial evidence to support the charge of OWI. 

After the verdict, he filed a motion for new trial claiming “the verdict is contrary to 

law or evidence,” which the court also denied. On appeal, he claims the court

 

6 The jury instructions included the charge that Sanchez-Casco “did operate a motor 

vehicle while under the influence of an alcoholic beverage or drugs or a combination of 

such substances, in violation of Section 321J.2(2) of the Code of Iowa.” 
8

erred in its denial of both the motion for judgment of acquittal and the motion for 

new trial. He frames both claims as a challenge to the sufficiency of the evidence. 

However, our supreme court has explained the two motions have distinct 

standards:

On a motion for judgment of acquittal, the court is required to 

approach the evidence from a standpoint most favorable to the 

government, and to assume the truth of the evidence offered by the 

prosecution. If on this basis there is substantial evidence justifying 

an inference of guilt, the motion for acquittal must be denied.

On a motion for new trial, however, the power of the court is 

much broader. It may weigh the evidence and consider the credibility 

of witnesses. If the court reaches the conclusion that the verdict is 

contrary to the weight of the evidence and that a miscarriage of 

justice may have resulted, the verdict may be set aside and a new 

trial granted.

. . . . The motion [for new trial] is addressed to the discretion 

of the court, which should be exercised with caution, and the power 

to grant a new trial on this ground should be invoked only in 

exceptional cases in which the evidence preponderates heavily 

against the verdict.

State v. Ellis, 578 N.W.2d 655, 658–59 (Iowa 1998) (quoting 3 Charles A. Wright, 

Federal Practice and Procedure § 553, at 245–48 (2d ed.1982)).

A. Sufficiency of the Evidence

To the extent Sanchez-Casco challenges the denial of his motion for 

judgment of acquittal, his challenge is to the sufficiency of the evidence. See id. 

We review insufficient-evidence claims for errors at law. State v. Ramirez, 895 

N.W.2d 884, 890 (Iowa 2017). A verdict has sufficient evidence if it is supported 

by substantial evidence. Id. “Evidence is considered substantial if, when viewed 

in the light most favorable to the State, it can convince a rational jury that the 

defendant is guilty beyond a reasonable doubt.” State v. Sanford, 814 N.W.2d 

611, 615 (Iowa 2012).
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“A person commits the offense of operating while intoxicated if the person 

operates a motor vehicle in this state . . . [w]hile under the influence of an alcoholic 

beverage or other drug or a combination of such substances.” Iowa Code 

§ 321J.2(1)(a) (2017). Regarding intoxication, Officer Brewer opined SanchezCasco was intoxicated by both alcohol and non-alcohol substances. She based 

her opinion on her training, her personal interactions with him, and her discussions 

with Sergeant Martin and Officer Joyce. Sergeant Martin, Officer Joyce, and the 

store clerk all testified about their observations of Sanchez-Casco’s odd and 

irritable behavior. The jury can personally observe his behavior in the surveillance 

videos from the first convenience store and the police cruisers. Finally, he refused 

to provide breath, urine, and blood samples for testing. See State v. Bloomer, 618 

N.W.2d 550, 553 (Iowa 2000) (finding evidence a defendant refused to submit to 

a breath test was admissible at trial for OWI when the defendant did not consent 

to a test with the arresting officer and did not obtain an independent test). This 

provides substantial evidence for a reasonable jury to conclude he was under the 

influence of alcohol, another substance, or a combination of substances on the 

morning of May 16, 2017. 

The record supports finding Sanchez-Casco operated a vehicle at both 

convenience stores on the morning of May 16, 2017. First, the store clerk 

witnessed Sanchez-Casco operating the Chrysler while driving around and away 

from the first convenience store. She testified he was already displaying odd and 

irritable behavior at this point. Her testimony about his behavior in the store and 

the officers’ testimony about finding him intoxicated a little later that morning

provide sufficient evidence for a reasonable jury to conclude he was driving while 
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intoxicated at the first convenience store. He notes the clerk testified she did not 

believe he was intoxicated while in the store based on her experience as a 

bartender. However, Officer Brewer testified Sanchez-Casco intoxication resulted 

from consuming both alcohol and other substances.

7

 Therefore, even considering 

the clerk’s opinion on his intoxication, the jury was able to accept Officer Brewer’s 

testimony that he was intoxicated by alcohol, another substance, or a combination 

while driving at the first convenience store.

Second, officers found a Chrysler parked at the second store that matched 

the description of the vehicle from the first store. No one was with Sanchez-Casco 

who could have driven the vehicle instead of him, and the key to the Chrysler was 

in his pants pocket. This evidence supports finding he drove the Chrysler to the 

second store. See State v. Hopkins, 576 N.W.2d 374, 377–78 (Iowa 1998) 

(allowing circumstantial evidence to establish a defendant was “intoxicated when 

driving to the location where the vehicle was parked”). When considering the 

evidence of his intoxicated state when the officers encountered him at the second 

store, a reasonable jury had sufficient evidence to conclude he drove the Chrysler 

to the second store and he was intoxicated at the time. 

Sanchez-Casco notes the exact time Sergeant Martin found him at the 

second store is not in the record. He asserts this missing time means the State 

cannot establish when he drove to the second store and whether he was 

intoxicated at the time. However, the store clerk testified Sanchez-Casco arrived 

 

7 Although the store clerk gave detailed and credible testimony based on her observations 

and prior experience as a bartender, counsel did not go further in exploring her 

qualifications to opine on intoxication. By contrast, Officer Brewer provided a significant 

foundation to render an opinion on intoxication. 
11

at the first store at about 1:30 or 1:40 a.m. She called the police to report his 

behavior, and Sergeant Martin was notified of the call at or about 1:42 a.m. 

Sergeant Martin then drove toward the first store, and she found him at the second

store after driving several blocks. While these facts cannot establish the exact 

time Sergeant Martin encountered Sanchez-Casco, the facts show she was alerted 

to his behavior no more than about twelve minutes after he arrived at the first store 

and she found him only after the time needed to drive several blocks to the second 

store. Therefore, a reasonable jury could conclude he drove to the second store 

shortly before Sergeant Martin encountered him and the intoxicated state officers 

described reflected his condition minutes earlier while driving to the second store.

Sanchez-Casco points to other evidence that suggests he was not driving 

while intoxicated on the morning in question. Besides the single beer at the first 

store, no one saw him consume drugs or alcohol. Officers did not find drugs or 

alcohol on him or in the Chrysler. Other than his actions in the first store’s lot, no 

one saw him driving erratically or otherwise driving at all. His signs of intoxication 

increased considerably between the descriptions provided by the store clerk, 

Sergeant Martin, and Officer Brewer. He never displayed certain signs of 

intoxication, such as falling down or vomiting. He never underwent objective 

testing for intoxication. He was able to make all of these arguments to the jury, 

and the jury was entitled to disregard them. See State v. Thornton, 498 N.W.2d 

670, 673 (Iowa 1993). Even considering his arguments, the evidence described 

above is sufficient for a reasonable jury to convict him of OWI.
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B. Weight of the Evidence

To the extent Sanchez-Casco challenges the denial of his motion for new 

trial, his challenge is to the weight of the evidence. See Ellis, 578 N.W.2d at 658–

59. We review weight-of-the-evidence claims for abuse of discretion. State v. 

Reeves, 670 N.W.2d 199, 203 (Iowa 2003). Establishing an abuse of discretion 

requires showing “the district court exercised its discretion on grounds or for 

reasons clearly untenable or to an extent clearly unreasonable.” Id. at 202. “On a 

weight-of-the-evidence claim, appellate review is limited to a review of the exercise 

of discretion by the trial court, not of the underlying question of whether the verdict 

is against the weight of the evidence.” Id. at 203.

As explained above, Officer Brewer opined Sanchez-Casco was intoxicated 

based on her training, her interactions with Sanchez-Casco, and her discussions 

with Sergeant Miller and Officer Joyce. All three officers and the store clerk

provided testimony about his odd and irritable behavior and other indicia of 

intoxication, which was supported by surveillance video. Their observations of his 

intoxicated condition occurred in close temporal proximity to his operation of a 

vehicle. Even considering his evidentiary arguments that question whether he 

committed OWI, we find the court did not abuse its discretion in finding the verdict 

was not contrary to the weight of the evidence. See id. Therefore, the court did 

not abuse its discretion in denying his motion for new trial.

IV. Conclusion

The district court did not abuse its discretion in allowing Officer Brewer to 

present expert testimony. The court also did not err in finding the verdict was
13

supported by substantial evidence, nor did the court abuse its discretion in finding 

the verdict was not contrary to the weight of the evidence. Therefore, we affirm.

AFFIRMED.