Richland County deputies have arrested a man who they say brutally beat and sexually assaulted an 85-year-old woman in her northeast Columbia home on Valentine's Day.

Marquille Rondale Livingston, 36, was arrested on his birthday Saturday on charges of first degree burglary, criminal sexual conduct, kidnapping and petit larceny.

Deputies say Livingston broke in to the home of an 85-year-old woman's home Brighton Hill Road in the early hours of Wednesday morning. Livingston then attacked the victim with his fists and brutally assaulted her sexually, investigators say.

When the woman attempted to use her medical alert device bracelet for help and made contact with the agent, deputies say Livingston took over the conversation and told them everything was fine. Before leaving her home, deputies say Livingston stole cash and the woman's watch.

Investigators say the crime lab was able to collect DNA at the scene, which they say was instrumental in identifying Livingston.