Kiera Bergman

The boyfriend of a Phoenix teenager who went missing in April was arrested on unrelated charges after he refused to take a polygraph exam to prove his innocence in her disappearance.

Kiera Bergman, 19, was last seen in her Phoenix apartment on April 4.

Police suspected her 23-year-old boyfriend, Jon-Christopher Clark, might have something to do with her disappearance, but he steadfastly refused to take a polygraph examination.

According to the NY Daily News, Clark said he didn’t want investigators to “pretty much gather conclusions off of something that is not guaranteed.”

Clark was arrested Friday and charged with 22 counts of aggravated identity theft and two counts of forgery, police confirmed to The News.

He was taken into custody after police executed a search warrant on his car. Investigators confirmed the arrest was not related to Kiera’s disappearance.

Kiera’s roommate said she received an out-of-character text from Kiera in the hours after she went missing.

Destiny Hall-Chand said the text message indicated Kiera was on her way to meet up with a man she met at a store several days prior.

Hall-Chand told KPHO-TV the text was “something that’s not like her. I mean, that’s not something she would do.”

It was also uncharacteristic of the teen to leave home without her purse or her keys.

Police focused their investigation on Kiera’s boyfriend who was the last person to see her.

Clark told police they argued and she left her apartment to “go clear her head.”

He told the Huffington Post, “I didn’t really find it unusual until she wasn’t in contact with me.”

Clark is set to be arraigned in court on Friday.