Police are investigating after four people were found dead inside a Blue Springs apartment on Friday.  The bodies of a man, woman, and two young children were found around 1:00 p.m. at the residence in the 1200 block of Cheshire Place.  According to Sergeant Joe Fanara, they are not looking for any suspects and the main offender is believed to be one of the deceased.   Authorities have not released the cause of deaths, but the investigation points to a murder-suicide.