Alexis Simpson and Dominique Frazier never got along while living together at Bowie State University, according to attorneys, who on Tuesday described the roommates’ troubled relationship that quickly boiled over in September 2011 into a physical confrontation that left Frazier dead and Simpson charged with murder.

Prosecutors say Simpson, then a transfer to Bowie State beginning her sophomore year, chose to aggressively pursue Frazier on the night of Sept. 15, after a disagreement about music being played on an iPod escalated to the point where the two women ferociously traded blows.