A 17-year-old woman is accusing a registered sex offender living in Baton Rouge of grabbing her while she was checking her mail Tuesday morning, forcing her back into her house and raping her on the living room couch, according to the warrant for Parker’s arrest.

Baton Rouge Police arrested Percy Ray Parker Jr., 44, later that day on first-degree rape.

The victim’s 5-year-old brother and 82-year-old grandmother were inside the home during the attack, the report says.

The victim had fought back, but Parker overpowered her, the police report says. After the rape, Parker ran out the front door.

The victim told police that after he left, she got into a bathtub of water, and when investigators showed up, they found what appeared to be semen floating in the water, the report says.

Parker has been convicted of multiple sex crimes in the past, including rape, and the District Attorney’s Office confirmed he has done time in prison, at least nine years, though the details were unclear Thursday.

Unlike other counts he has been accused of, though, “The first-degree rape — that’s a mandatory life sentence if he’s convicted of that,” Assistant District Attorney Tracey Barbera said.

The DA’s Office currently has a failure-to-register case open in Parker’s name.

Parker, 5134 Hammond St., was booked into East Baton Rouge Parish Prison late Tuesday night on first-degree rape and home invasion.