A Minneapolis man has been found guilty of posing as a personal care attendant in order to have sex with a vulnerable adult.

Corey Gordon, 43, was convicted Thursday of third-degree criminal sexual conduct, Hennepin County Attorney Mike Freeman said Friday.

After delivering the verdict following 2½ days of deliberation, the jury was asked to deliberate again on whether Gordon used multiple forms of sexual penetration on his victim, which could result in a longer sentence. The jury found the prosecutors had proved that to be the case.

The Hennepin County attorney's office will ask for a life sentence at his Sept. 25 sentencing, Freeman said.

"Mr. Gordon is the worst kind of predator, seeking out a woman who he knew had the reasoning and emotional abilities of a fourth-grader and then posing as her personal care attendant to have sex with her while she was supposed to be getting treatment," Freeman said.

At Gordon's sentencing, prosecutors plan to point to his prior convictions for criminal sexual conduct, as well as to introduce evidence that indicates he may have had other victims, said Chuck Laszewski, spokesman for the county attorney's office.

According to the criminal complaint and testimony in the seven-day trial, Gordon approached his victim, who is 10 years his junior, at the Mall of America and took her to a coffee shop in October 2012. When the woman's mother came out of another store, her daughter told her that she and Gordon had exchanged phone numbers and the mother could see Gordon was reading about the woman's disability on his iPad.

Over the next few months, the woman's mother saw text messages on her daughter's phone that indicated they may be in a romantic relationship, according to the charges. Family members told Gordon to leave the young woman alone.

Three times a week, she would take a bus to the Courage Kenny Rehabilitation Institute in Golden Valley for therapy. On May 24, 2013, the victim's mother drove her there and when they arrived, a staff member told the mother the victim's personal care attendant was waiting. The mother recognized Gordon, and when she confronted him, he quickly left.

The victim had never had a personal care attendant. Gordon had posed as her attendant, which allowed him to take her to the assisted-dressing rooms at the Courage Institute and have sex with her.