PITTSBURGH -- Police have filed new and unrelated rape charges against a man accused of killing his ex-girlfriend, a University of Pittsburgh student who wasin her off-campus home.
Police charged 21-year-old Matthew Darby Thursday with raping a teenage girl just days before the Oct. 8 death of Alina Sheykhet.
Darby is charged with criminal homicide in Sheykhet's death and was arrested last week in Myrtle Beach, South Carolina.
Police allege Darby broke into Sheykhet's home and beat her to death. She had recentlyagainst him.
Darby has pleaded not guilty to charges he raped another ex-girlfriend earlier this year in Indiana County.
Darby's attorney David Shrager says he's reviewed the allegations and calls them "serious."
He hasn't been able to discuss them with Darby, who's awaiting extradition to Pittsburgh.