( CNN ) A 32-year-old Massachusetts man is facing murder charges , authorities said Wednesday , four days after another man 's remains were found in a duffel bag . The Middlesex District Attorney 's Office said that Carlos Colina , 32 , will be arraigned the morning of April 14 for murder in connection with the remains discovered Saturday in Cambridge . Earlier this week , Colina was arraigned on charges of assault and battery causing serious bodily injury and improper disposal of a body . A Middlesex County judge then revoked bail for Colina in another case he 's involved in , for alleged assault and battery . The victim in that case is different from the one whose remains were found in recent days . Police were notified Saturday morning about a suspicious item along a walkway in Cambridge . Officers arrived at the scene , opened a duffel bag and found human remains . After that discovery , police say , a surveillance video led them to an apartment building , where more body parts were discovered in a common area . That location is near the Cambridge Police Department headquarters . The remains at both locations belonged to the same victim , identified Monday as Jonathan Camilien , 26 . Camilien and Colina knew each other , according to authorities . `` This was a gruesome discovery , '' District Attorney Marian Ryan said . CNN 's Kevin Conlon contributed to this report .
Prosecutor : Carlos Colina , next week , will be arraigned on the murder charge 32 . He 's already been arraigned for alleged assault and battery , improper disposal of a body . Body parts were found in a duffel bag and a common area of an apartment building .