Columbia, SC (WLTX) - Richland County deputies say the assault of an 85-year-old woman wasn't the first sexual offense for a 36-year-old suspect.

Marquille Rondale Livingston was arrested after reportedly breaking into the home of an 85-year-old woman's home on Valentine's Day, then brutally beating and sexually assaulting her.

He was initially charged with first degree burglary, criminal sexual conduct, kidnapping and petit larceny.

In a press conference Thursday, Richland County Sheriff Leon Lott stated the suspect is facing additional charges for another sexual assault incident that occurred in December 2016 in northeast Columbia.

Livingston reportedly broke into the home of a 70-year-old woman, tased her repeatedly, then sexually assaulted her.

Forensic evidence, and a "trophy" kept by the suspect led law enforcement to the December 2016 victim, who was able to pick Livingston out of a lineup.

"He thought he was smart, he had been through the system, he thought he could conceal evidence, that he could do a lot of things to keep himself from getting caught, but he wasn't smart... He would not have stopped, and that's what the scary part is," Lott said.

Law enforcement doesn't believe the suspect knew either victim, calling the incidents "stranger sexual assault."

Additional charges include criminal sexual conduct in the first degree, burglary in the first degree, kidnapping and grand larceny.

Lott says the 2016 sexual assault was reported, and he encourages all victims to come forward so they can catch all the "monsters."

"Anyone whose a victim of sexual assault, that hasn't reported, it doesn't matter how long ago it was, report it," he said.