Strict federal privacy laws protecting patients at health-care facilities left law enforcers in a frustrating situation as they sought to apprehend a man suspected of assaulting his wife and trying to burn her house down.

"We at least would like to know where these people are at," said Salt Lake County Sheriff's Sgt. Paul Jaroscak.

But that wasn't how it worked out earlier this week when deputies tried to serve an arrest warrant on the man, who had checked himself into the University Neuropsychiatric Institute (Uni). Although officers had learned from informants that the man was there, hospital officials refused to disclose if he was a patient, citing federal privacy laws.

Law enforcers fear criminals may try to use those privacy rules — such as the Health Insurance Portability and Accountability Act — as a way to hide from police.

The incident began May 18 when Alejandro Don Martinez got into an argument with his wife near 1700 East and 8600 South, according to an affidavit for a search warrant filed in 3rd District Court.

As the wife drove away from the house, Martinez threw a rock through her driver's side window and hit her in the head, causing her to bleed, according to the affidavit.

Later Martinez used cigarettes and newspapers to start a fire inside the house, the affidavit stated. He was injured in that fire.

Martinez was admitted to University Hospital. Investigators learned through other sources he was there. But when detectives went to the hospital, "hospital staff refused to disclose any information about the defendant, including his presence or absence at the hospital," the affidavit stated.

Martinez was released from the hospital without authorities being notified as they had requested, the affidavit stated.

On Monday, deputies learned Martinez was staying with his mother and called her, notifying her of the arrest warrant and telling her to have her son turn himself in. Instead, Martinez checked into Uni.

Again, federal privacy laws prohibited the hospital from confirming to police whether Martinez was present, even when detectives arrived at the front door with an arrest warrant.

After a search warrant was obtained, hospital officials were able to confirm Martinez's presence. He was booked into the Salt Lake County Jail on Tuesday for investigation of aggravated arson and aggravated assault. He also had warrants in previous cases for aggravated assault and aggravated arson.