EVANSDALE, Iowa – The aunt of the two missing Iowa cousins said Thursday that authorities have accused a family member of involvement with the girls' disappearance. 
 
 Tammy Brousseau, the sister of Misty Morrissey and Heather Collins, whose daughters Lyric Cook, 10, and Elizabeth Collins, 8, vanished last Friday, said Morrissey's estranged husband Daniel Morrissey has been the subject of intense police scrutiny. 
 
 "They have accused him," Brousseau said. "They told him they had proof that he did it." 
 
 "They found out a couple of family members have a criminal history so they're focusing really hard on them," she told reporters today. 
 
 Police today said they could make no one available to speak with reporters because all available staffers were out working to find the missing girls. 
 
 Brousseau told reporters that the family was at a hotel last night when the FBI showed up to interrogate them. Daniel, she said, kept telling investigators that he needed to sleep, a comment that prompted authorities to ask him how he could sleep at a time like this. 
 
 "They're working with them 100 percent despite what they're saying," Brousseau said of Daniel and Misty. 
 
 In the past day, investigators have seized the couple's computers. Now, Tammy said, the couple has been advised by an attorney not to talk to the police or the media or take any more polygraph tests. 
 
 Brousseau acknowledged that Misty is currently on federal probation. Also, Tammy noted, the couple is under a restraining order but are now allowed to spend time with each other as long as they don't fight. 
 
 Earlier, Misty and Daniel Morrissey had said they have been questioned so extensively by police that it is now getting on their nerves. 
 
 "You tell them the truth and they say, 'You're holding something back,' and you're not. What is left to talk about? You know, we go over and over and over again," Daniel Morrissey told KCCI Des Moines this week. "It made me feel like, 'Yeah, they're looking at me like a suspect.'" 
 
 Both Daniel and Misty have criminal records. In fact, Misty, whose maiden name is Cook, was just released from federal prison on May 30 after being convicted of nine crimes, including illegal drug use, association with persons involved in criminal activity, excessive alcohol use, and failure to comply with drug testing. 
 
 Eight years earlier, in 2003, she was sentenced to four years behind bars after she plead guilty to conspiracy to manufacture and distribute methamphetamine. Her sentence was later shortened to five months in prison and one year of supervised release. In 1998 she was found guilty of having an open container of alcohol in a vehicle and in 1997 she plead guilty a false report to law enforcement, a crime for which she was sentenced to six days in jail. 
 
 Misty also ran into trouble along with one of her bosses. According to court papers, Misty played a role in a meth operation run by David Mickelson, her former boss at the BIG Ten Mart in Waterloo, Iowa. 
 
 "Cook testified that she obtained pseudoephedrine pills from various people and provided them to Scott Reavis, who used them to make methamphetamine," court records state. 
 
 Cook twice purchased case quantities of pseudoephedrine pills from Mickelson – for $1,400 a case – and provided them to Reavis to make meth. Mickelson was convicted of conspiracy to manufacture meth and distribute pseudoephedrine with that intent. He was sentenced to 121 months in jail. 
 
 Since the early 1990s, Daniel Morrissey has been convicted of burglary, theft, drug possession, intoxicated driving, parole and probation violations and interference with official acts, according to online court records. 
 
 The revelation of Misty's criminal past comes at a time when she finds herself in the national spotlight. In an interview with ABC News Wednesday morning, she said she had talked to the police time and time again as authorities have investigated what happened to Lyric and Elizabeth. 
 
 "We've done extensive interviews, hours at a time. We've done polygraphs. We have taken many phone calls, answered many questions," she said. "We've given our phones up. All of our data has been, you know, taken off of our phones. In fact, my sister and my phone is now not – our touch screens aren't working very well. So we've cooperated to the fullest, you know." 
 
 Former FBI special agent Brad Garrett believes investigators are looking closely at every aspect of the parents' lives. 
 
 "What comes into question is how does that play into what is presently going on in their lives? And more particular, does it have any relationship to these two missing girls?" Garrett said. 
 
 In the weeks before the girls' disappearance, Misty and Daniel were having problems at home – they were preparing to file for divorce after being separated for years. 
 
 "They are not a couple," Misty's sister Tammy Brousseau told ABC News Wednesday. "They are currently separated and maybe well on the way to a divorce." 
 
 Daniel Morrissey, who has a criminal record himself, told ABC News Tuesday that he was trying to keep his emotions in check during this difficult time. ||||| Law enforcement officials have called for all trash in Evansdale, Iowa, to be set aside in the Black Hawk County landfill, where it will be searched as part of the ongoing hunt for two missing cousins. (Matthew Putney / Waterloo Courier / ) 
 
 Family members of two missing Iowa girls took different stances with authorities Thursday, nearly a week after the cousins vanished. 
 
 Daniel and Misty Morrissey, parents of 10-year-old Lyric Cook, have hired an attorney who has advised them to stop talking to police, Misty’s sister, Tammy Brousseau, told local media. 
 
 But Misty’s other sister, Heather Collins, and her husband, Drew, plan to continue cooperating with authorities who are searching for their 8-year-old daughter, Elizabeth, and her cousin, a friend of the family told the Los Angeles Times. 
 
 “Heather and Drew have been called in so many times by the FBI and gone willingly because one little answer could lead to something,” said Renee Wrabek, who has known the couple for six years. “They want to do whatever it takes to get those children found.” 
 
 Elizabeth and Lyric disappeared July 13 after leaving Elizabeth’s Evansdale home about noon on their bicycles. The bikes were found about a mile away at Meyers Lake. 
 
 Since then, parents of both girls have been questioned numerous times by authorities, turned over their cellphones for inspection and taken polygraph tests. 
 
 Things changed after the Morrisseys felt they were being accused of a crime and news surfaced of their criminal records -- including possession of methamphetamine and marijuana and petty theft. 
 
 “At this point because they’re being harassed so badly, they’ve been advised by an attorney to stop doing any polygraph tests, to not talk to the media anymore. … They’ve been advised to not talk to the police,” Brousseau told a group of news outlets, including the Des Moines Register. “They have accused [Daniel Morrissey]. They said they have evidence. We all know if that was the truth they’d already have Dan locked up.” 
 
 Although the Collinses do not believe Daniel Morrissey was involved in the girls’ disappearance, they want to distinguish themselves from their family members, said Wrabek, who noted that Lyric and her 16-year-old brother, Dillin, lived with the Collinses for several years while Misty Morrissey was incarcerated. 
 
 “The lawyer for the family does not represent Heather and Drew,” Wrabek said. “You have to check every single lead and every single avenue no matter what, and that’s why Heather and Drew have cooperated 100%. They’re obviously not happy about Misty and Dan because if they’re not cooperating then the focus is turned away from finding the girls.” 
 
 An FBI dive team is scheduled to start searching the lake Friday morning. 
 
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– The father of one of two missing girls in Iowa is a suspect in their disappearance, the girls' aunt has told ABC News. Police "have accused" Daniel Morrissey, said Tammy Brousseau, sister of both girls' moms. Police told family members "they had proof" that he played a role in the disappearance of his 10-year-old daughter, Lyric Cook-Morrissey, and her cousin, Heather Collins, 8, added Brousseau. The girls' bikes were found near a lake last week. When the FBI turned up at a hotel this week to question Morrissey and his wife, Misty, he told investigators he needed to sleep, which made them increasingly suspicious, Brousseau said. Both Daniel and Misty Morrissey have extensive criminal records linked to alcohol abuse and drugs. Misty, who was released from her latest prison stint just over a month ago, has also been convicted of manufacturing and distributing methamphetamine, and Daniel has also been convicted of burglary and theft, notes ABC. Authorities have reportedly seized a computer belonging to the couple. The two, who are about to get a divorce, have told the press they're becoming frustrated with the deluge of questions from law enforcement authorities, and have hired an attorney who has advised them to stop speaking to police, reports the Los Angeles Times. Morrissey has said he "feels like a suspect." Heather's parents are continuing to cooperate with authorities. Officials haven't publicly released any information about suspects in the girls' disappearance.