A search warrant has been executed at the home of a missing Missouri mother of three.

The search of Renee Pernice's house in Northland began on Thursday and could last for 24 to 36 hours.

Detectives have classified her disappearance as suspicious and say they suspect foul play.

Pernice was last seen the morning of Jan. 2 by her husband, Army Sgt. Shon Pernice.

He was at home with his mother when more than a dozen officers and crime scene investigators arrived to execute the search warrant. He left in a van, taking some clothes with him.

No arrests have been made. But his attorney, Kevin Baldwin, told the Kansas City Star that it seems like authorities "are trying to create a situation" for his client.

“They know he is an Iraqi veteran and has a traumatic brain injury, and while, yes, like many Missourians, he owns guns, they could have called us and had us take him into custody,” Baldwin told the Star. “They could have waited until he left to pick up his kids from school.

“They have not charged him with anything, but it seems like they are trying to create a situation for him.”

In addition to permitting police to search the house under certain conditions, Baldwin and his client also gave the go-ahead for the Pernices' sons to be interviewed by investigators in a neutral location, according to the newspaper.

Also Thursday, authorities on horses and in all-terrain vehicles and a helicopter assisted in the search for evidence in a wooded area.

Shon Pernice's lawyer said his client is cooperating with police and wants his wife to be found.

Police searched Reservoir Park in Kansas City on Thursday, MyFOXKC.com reported. The park has become the center of the investigation because Renee Pernice's cell phone was found there.

Her mother Linda Lockwood fears the worst, according to MyFOXKC.com.

"It's been too long for her to not have contacted any of us, so we feel like something bad has happened," she told the station. "She would never, never, never leave her kids and just not say anything to anybody."

The Pernices have two children of their own together and a third from one of Shon Pernice's prior relationships. Lockwood told MyFOXKC.com that she hasn't been in touch with her son-in-law or her grandchildren since her daughter's disappearance and wasn't sure who was taking care of the kids.

The couple had been periodically having marital problems. After initiating divorce proceedings in 2005, the Pernices voluntarily withdrew the filing in 2007 because they reconciled. But when Shon Pernice returned recently from serving in Iraq as a medic, things got rocky again, according to the Kansas City Star.

Shon Pernice said he was sleeping in the basement when his wife told him she was going out about 9 a.m. Jan. 2. He claims he doesn't remember where she said she was heading or what she was wearing because he was tired. She took her cell phone and keys with her, he said.

He was apparently the last person to see Renee. Her father, Rick Pretz, reported her missing after she didn't return phone calls from her parents. Pretz said he last spoke to his daughter about 7 p.m. on New Year's Day.

Her cell phone was found about 12 to 15 miles away from the Pernices' home in an area with no connection to the missing woman, according to police.

Renee Pernice teaches nursing students and was due back to work this week.

Shon Pernice spoke to MyFOX Kansas City over the summer about the stress he was feeling after coming home from Iraq.

"Over there ... you may be blown up and killed," he told the station. "There's people that hate us very much over there."

Anyone with any information about the missing woman is asked to call the TIPS Hotline at (816) 474-TIPS.

Click here to watch the interview with Shon and Renee Pernice.

Click here for more on this story from MyFOXKC.com.

Click here for more on this story from the Kansas City Star.

The Associated Press contributed to this report.