In the

United States Court of Appeals

For the Seventh Circuit ____________________ 

No. 22-3139 

UNITED STATES OF AMERICA, 

Plaintiff-Appellee, 

v.

MARIO GIANNINI, 

Defendant-Appellant. 

____________________ 

Appeal from the United States District Court for the 

Northern District of Illinois, Eastern Division. 

No. 1:20-cr-00551-3 — Matthew F. Kennelly, Judge. 

____________________ 

ARGUED FEBRUARY 21, 2024 — DECIDED JUNE 18, 2024 

____________________ 

Before EASTERBROOK, BRENNAN, and KIRSCH, Circuit 

Judges. 

KIRSCH, Circuit Judge. After a five-day trial, a jury found 

Mario Giannini guilty of wire fraud and honest services 

fraud. Giannini appeals the denial of his motion for a mistrial 

based on the government’s belated disclosure of investigating 

agents’ notes regarding an inculpatory statement he made to 

Robert Czernek, a co-defendant. He also asserts that the court 

erred in allowing the prosecutors, in closing arguments, to 
2 No. 22-3139 

raise the conduct of another co-defendant, Debra Fazio, who 

was dismissed from the case following the government’s 

case-in-chief after the court granted her motion for acquittal. 

Because the district court neither abused its discretion in 

denying the motion for a mistrial nor plainly erred in allowing the prosecutors to discuss Fazio’s conduct, we affirm.

I 

Mario Giannini and Robert Czernek engaged in a nearlydecade long series of schemes in Bloomingdale Township, Illinois involving fraudulent invoices and kickbacks. Czernek, 

the Highway Commissioner for the Township, was responsible for reviewing and approving invoices that the Township’s 

contractors submitted for payment. Giannini worked for one 

of the contractors, Bulldog Earth Movers, which was solely 

owned by his longtime girlfriend, Debra Fazio. 

In the first scheme, beginning in 2012, Giannini and Czernek agreed that Bulldog would artificially inflate its invoices 

for delivering stone and split the inflated amount between 

Czernek and Bulldog. In the second, around 2016, Giannini 

requested that Czernek assign to Bulldog work moving and 

leveling dirt at a dump site. Czernek would leave notes describing what work Bulldog should bill, and Giannini would 

give those notes to Fazio to prepare invoices that falsely increased the number of work hours Bulldog performed. Czernek approved the invoices, and Giannini kicked back some of 

the proceeds to Czernek. Finally, around 2019, Czernek and 

Giannini arranged for Bulldog to bill the Township for work 

repairing storm sewers that Bulldog never performed. Giannini kicked back some of the profits to Czernek, again using 

invoices prepared by Fazio based on Czernek’s notes. Giannini paid Czernerk via checks made out to Tri-State Express, 
No. 22-3139 3 

a trucking company owned by Czernek that had been dissolved in 1998 and had not done any work after the mid2000s. 

Giannini, Czernek, and Fazio were indicted on fourteen 

counts of wire and honest services fraud in violation of 18 

U.S.C. §§ 1343 and 1346, and Fazio was additionally charged 

with six counts of money laundering in violation of 18 U.S.C. 

§ 1957(a). Czernek chose to cooperate with the government 

and pleaded guilty to wire and honest services fraud pursuant to a cooperation plea agreement. Giannini and Fazio proceeded to trial, but, following the government’s case-in-chief, 

the district court granted Fazio’s motion for acquittal on all 

counts under Federal Rule of Criminal Procedure 29. 

In his trial testimony, Czernek described an inculpatory 

conversation he and Giannini had in November 2019: Giannini, in response to Czernek’s noting that Giannini’s toy truck 

collection appeared “expensive,” stated, “[a]s long as we keep 

doing what we’re doing, it will be okay.” On cross-examination, among numerous other attempts at impugning Czernek’s credibility, Giannini’s counsel sought to show that Czernek had fabricated this statement for trial by asking him 

whether he had told any government agents about the conversation. Czernek replied that he had done so in a meeting 

with the government the day before his testimony. 

The next day, the FBI agent present at that meeting, Matthew Blankenship, testified that Czernek had first made the 

statement in a meeting with an IRS agent over a week before 

his testimony. He also noted that he had erroneously failed to 

include the statement in the reports produced to Giannini, 

which described Czernek’s meetings with the government.

The district court ordered the government to produce the 
4 No. 22-3139 

notes of the meetings. The government complied, producing 

both agents’ notes. 

Giannini’s counsel moved for a mistrial, arguing that the 

government’s delayed disclosure violated Federal Rule of 

Criminal Procedure 16 and the Jencks Act, 18 U.S.C. § 3500. 

The district court denied the motion. It concluded that the 

notes should have been produced under Rule 16 and the 

Jencks Act but that a mistrial was not needed because the delayed production did not sufficiently prejudice Giannini. As a 

remedy, it barred the government from introducing the notes 

at trial to bolster Czernek’s and Agent Blankenship’s testimony and allowed Giannini to recall Blankenship to ask 

about the notes, but Giannini did not do so. Moreover, during 

his testimony, Giannini denied making the statement to Czernek, and the court believed his denial substantially diminished the prejudice from the delay. 

The trial proceeded to closing arguments, during which 

the prosecutors made numerous references to Fazio and her 

conduct. Giannini did not object to those remarks. Some of the 

comments emphasized the greed of Fazio, Giannini, and 

Czernek as motivating the schemes. Others described Fazio’s 

role as the sole owner of Bulldog, Bulldog’s role in the 

schemes, and Fazio’s involvement in the schemes through her 

creation of fraudulent invoices. After closing arguments, 

Giannini was found guilty on all counts. 

II

A 

On appeal, Giannini first argues that the district court 

erred in denying his motion for a mistrial. Giannini contends 

that the belated production of the agents’ notes, which the 
No. 22-3139 5 

district court found violated Rule 16 and the Jencks Act, 

caused him sufficient prejudice to merit a mistrial because it 

impeded his ability to effectively cross-examine Czernek. He 

also contends that it bolstered Czernek’s credibility and diminished both his and his counsel’s credibility. 

We review denial of a motion for mistrial for abuse of discretion and will affirm unless the error was not harmless—the 

prejudice from the violation must have deprived Giannini of 

a fair trial. United States v. Lawrence, 788 F.3d 234, 243–44 (7th 

Cir. 2015). We conduct this review “with an extra helping of 

deference” in consideration of the district court being best positioned “to determine the seriousness of the incident in question, particularly as it relates to what has transpired in the 

course of the trial.” Id. at 243 (quotation omitted). 

The district court found that the prejudice to Giannini 

from the belated disclosure (his pursuit of a fruitless line of 

cross-examination) was minimal, if not nonexistent, and thus 

could not justify granting a mistrial. It also noted that Giannini’s denial that he made the statement further limited the 

prejudice from the delayed production. And it sought to cure 

any prejudice by barring the government from introducing 

the agents’ notes. 

We first address the Rule 16 issue, which the district court 

handled well. Rule 16 requires the government to disclose 

documents and papers within its “possession, custody, or 

control” that are material to preparing the defense or that the 

government intends to use in its case-in-chief at trial. If the 

government fails to comply with Rule 16, the court can order 

discovery or “enter any other order that is just under the circumstances.” Fed R. Crim. P. 16(d)(2). This includes ordering 

a mistrial, but such a remedy is “appropriate only when all 
6 No. 22-3139 

other, less drastic remedies are inadequate.” United States v. 

Tomkins, 782 F.3d 338, 348 (7th Cir. 2015) (cleaned up). At 

base, a mistrial is warranted “only if the alleged Rule 16 violation deprived [the defendant] of a fair trial.” Lawrence, 788 

F.3d at 244. 

Assuming the government’s delayed disclosure violated 

Rule 16, the district court did not abuse its discretion by denying Giannini’s motion for a mistrial. The late disclosure resulted in little to no prejudice to Giannini, and the court’s 

remedies were adequate to address any such prejudice. 

Giannini may have been surprised by the late revelation

of the notes, but he still had sufficient opportunity to prepare 

and present his defense. His strategy was to impeach Czernek 

by showing that he was not credible and that he fabricated the

inculpatory statement for trial in order to earn his cooperation. This late disclosure had little impact on that strategy. 

Czernek admitted that he first revealed the statement to investigators only shortly before trial, so it still could have been 

fabricated, and insinuated that he made the statement to ensure he got cooperation credit. So while the late disclosure 

may have made this line of impeachment somewhat weaker, 

it did so only marginally because Giannini was able to leverage this statement, as well as a bevy of other examples, to suggest that Czernek was not credible. Simply, the belated disclosure did not prevent Giannini from impeaching Czernek 

and thus did not prejudice him. Cf. United States v. Warren, 

454 F.3d 752, 760–61 (7th Cir. 2006) (finding no prejudice 

where the belated production of evidence did not prevent the 

defendant from using it in his defense).

The only other possible prejudice to Giannini was from 

Agent Blankenship’s testimony that Czernek made the 
No. 22-3139 7 

statement to investigators over a week before his testimony, 

but this too was insufficient for a mistrial for two reasons. 

First, Giannini was still able to effectively cross-examine 

Agent Blankenship. Even after being confronted with the remark that Czernek made the statement at least a week before 

testifying, he was still able to suggest that: (1) there was no 

record of such a statement; and (2) Czernek was lying and had 

devised the statement for trial. He adduced testimony from 

Agent Blankenship that he had seen no reports containing

Czernek’s statement, that Czernek told agents of the statement only over a week before trial, and that Czernek had lied 

to investigators in the past. Second, the court’s remedy of barring the government from introducing the notes to corroborate Agent Blankenship’s testimony effectively limited any 

prejudice. While Giannini could imply there was no record of 

the statement, the government could not refute that position

with evidence of such a record. And Giannini used this to his 

advantage in closing, asserting that the agents thought Czernek’s statement was so insignificant that they did not even include it in a report. 

Giannini also urges that a mistrial was required under the 

Jencks Act. If the papers or documents in the government’s 

possession contain statements of a witness called by the government (so called Jencks material), the Jencks Act requires 

the government to produce those statements after the witness 

has testified on direct examination on motion of the defendant. 18 U.S.C. § 3500(b). If the government “elects not to comply” with an order mandating production of Jencks material 

the court “shall strike from the record the testimony of the 

witness” and can declare a mistrial if “the interests of justice 

require.” Id. § 3500(d). But if the government has no “motive 

to suppress evidence,” and “any prejudice resulting from the 
8 No. 22-3139 

tardy production of statements is curable at trial,” the government has not “elect[ed] not to comply.” United States v. Wables, 

731 F.2d 440, 447 (7th Cir. 1984). Thus, a court can “use its discretion to fashion appropriate remedies.” Id. 

There was no election not to comply with any court order, 

so the court acted soundly in refusing to grant a mistrial. The 

record does not suggest that the government intentionally 

withheld these notes or otherwise had any motive to suppress 

them. It indicates, at most, that the government’s conduct was 

a negligent oversight and an instance of poor record keeping. 

And the government’s prompt disclosure of the materials 

upon discovering they were in its possession dispels any indication of bad faith. Id. (“[T]he government’s diligence in 

gathering and producing all pretrial statements within 

twenty-four hours” of discovering a Jencks Act issue signified 

good faith.). Thus, there was no need to strike any testimony, 

let alone impose the drastic remedy of a mistrial. Additionally, as discussed, there was limited prejudice to Giannini 

from the belated disclosure, so any violation of the Jencks Act 

was harmless.

B 

Giannini’s second challenge on appeal is that the prosecutors’ references to Fazio’s acquitted conduct in closing arguments deprived him of a fair trial. Because he failed to object 

to these comments at trial, we review for plain error. United 

States v. Chavez, 12 F.4th 716, 728 (7th Cir. 2021). Even assuming error, we will not reverse unless Giannini “probably 

would have been acquitted if the prosecutor had not made” 

the challenged comments. Id. In other words, Giannini must 

“show that the outcome of the proceedings would have been 

different had the statements not been made.” United States v. 
No. 22-3139 9 

Guzman-Cordoba, 988 F.3d 391, 406 (7th Cir. 2021) (quotation 

omitted). For these reasons, we have cautioned that “improper comments during closing arguments rarely constitute 

reversible error.” United States v. Klemis, 859 F.3d 436, 442 (7th 

Cir. 2017) (quotation omitted).

We evaluate a claim of prosecutorial misconduct through 

improper statements at closing arguments in two steps. First, 

we determine if the comments were “improper standing 

alone.” United States v. Kelerchian, 937 F.3d 895, 916 (7th Cir. 

2019) (quotation omitted). Second, if they were improper, we 

then inquire “whether the remarks in the context of the whole 

record denied the defendants the right to a fair trial.” Id. 

We can resolve Giannini’s claim at step one: the remarks 

regarding Fazio’s acquitted conduct, even if they implied her 

guilt, were proper. This is a straightforward application of 

United States v. Briseno, 843 F.3d 264 (7th Cir. 2016). There, we 

focused on the relevance of the acquitted conduct described 

in the allegedly improper statements and noted that any argument that the statements were improper was erroneously 

premised on the idea that the acquitted conduct was irrelevant to the charge submitted to the jury. Id. at 269. Accordingly, we held that the references to a defendant’s acquitted 

conduct in closing arguments were proper because the evidence was directly relevant to the charge the jury would consider. Id. at 270. 

As in Briseno, the prosecutors’ comments pertaining to 

Fazio’s acquitted conduct were highly relevant to the charges 

against Giannini and thus were proper. Descriptions of what 

exactly Fazio did, her knowledge, her and Giannini’s motivations, and the role she (and Bulldog) generally played in the 

schemes were key to establishing a full story. For example, in 
10 No. 22-3139 

describing how the schemes operated, the government articulated how Fazio wrote fraudulent invoices and, because of 

her greed, failed to question their propriety. If the government could not discuss this evidence, it would leave a conceptual void in its case. Given Briseno, where it was proper to 

comment on a defendant’s acquitted conduct, it cannot be improper for the prosecutors to remark on this highly relevant 

evidence merely because it might have implied the guilt of 

Fazio—a former, acquitted defendant. 843 F.3d at 269–70. 

Even if it was error to allow the comments, it was harmless 

because, had the prosecutors not referenced Fazio, Giannini 

would not have been acquitted in light of the overwhelming 

evidence against him, as well as the weakness of his defense.

The government presented extensive testimonial and documentary evidence demonstrating Giannini’s guilt. This included testimony from numerous persons such as Czernek 

and FBI agents, and documentary evidence—for instance, the 

invoices from Bulldog that over-billed for the work performed and photographs showing that storm sewer work 

Bulldog billed for had not been done. Giannini’s defense was 

that the payments to Czernek were for work done by and 

equipment rentals to Tri-State, Czernek’s trucking company. 

That defense was fruitless: Tri-State had not operated for 

nearly a decade by the time the first scheme began. Moreover, 

his testimony in support of the defense was not credible. For 

example, he stated that he had a business card from Tri-State 

but could not produce it, and he was unable to identify any 

equipment rented out or any records of such rentals. In sum, 

allowing the prosecutors to reference Fazio in closing arguments did not constitute error, much less reversible error.

AFFIRMED