Kevin Morrison, 21, of Cambridge, was arrested April 12 as a suspect in a March 19 robbery in the Mather House courtyard. Morrison, who is not affiliated with Harvard, was taken into custody at his home and is due for a preliminary hearing in Middlesex County Court tomorrow. University Police Department spokesperson Peggy McNamara said the investigation continues, since Morrison's two alleged accomplices are still at large. Morrison has been charged with two counts of armed robbery.