A judge Thursday appointed an attorney for Jordan Boijseauneau. Officers say the 19-year-old beat his 17-year-old sister Stephanie to death last month.
Sheriff's deputies found Boijseauneau hiding in a closet with a self-inflected knife wound to his chest. The defendant's 15-year-old girlfriend was also found tied up in another room.
Jordan Boijseauneau is also facing a sexual assault of a child charge from May. Police would not go into specifics about that case. Montgomery County deputies are still searching for a motive in this killing.