Jerome Sells, 45, who is also known as Kamaki, pleaded no contest to a reduced charge of second-degree sexual assault for a January 2010 offense. He was sentenced last week to a 10-year prison term. The family of the victim, a then-13-year-old boy, had taken in Sells because he was homeless.
While the criminal case had been pending, Sells had tried to fake a mental illness, saying voices told him to act, and also tried to blame the victim for the crime.
The attorney for the prosecution, Robert Rivera, said the victim "did something very brave" by telling his parents.
"This is probably one of the most courageous things he had done or will ever do in his young life," Rivera said. "For male victims to report sexual offenses committed against them, that's rare.
Sells was ordered to pay $400 in restitution.