MILWAUKEE (AP) -- A Wauwatosa man who knew he was HIV-positive has been sentenced to 15 years in prison for sexually assaulting a 15-year-old boy.

The Journal Sentinel reports 51-year-old Eugene S. Gross was sentenced Friday.

Authorities say he was arrested in August 2017 after the boy's mother returned to her Brookfield home and the boy ran upstairs from the basement and said a strange man had entered the house and raped him.

Police found Gross walking through a backyard near the house.

Police say an investigation found the boy and Gross had met on a social media site and the boy had invited Gross to his home. Police say Gross acknowledged he was HIV-positive and had not used a condom when he had sex with the boy.