Bag was discovered near Cambridge police station on Saturday morning . More human remains later found in a common area of apartment building . A suspect has been arrested and charged with 'accessory ' , not homicide . They will not be identified until the arraignment on Monday , officials said . Comment:
Bag was discovered near Cambridge police station on Saturday morning . More human remains later found in a common area of apartment building . A suspect has been arrested and charged with 'accessory ' , not homicide . They will not be identified until the arraignment on Monday , officials said . Cambridge Police are treating grisly situation as homicide investigation .