A CNN review of audio and video capturing the attack, photos and satellite imagery of the mass grave, along with interviews with an eyewitness, forensic experts and family members provides a detailed account of the Israeli military’s targeting and burial of clearly marked rescue crews from the Palestinian Red Crescent Society,

The Israeli military said on Monday that an initial investigation into the killing of 15 emergency workers in south Gaza last month showed that the incident occurred "due to a sense of threat".

The U.N. has said Israel killed the workers. The video appears to contradict Israel’s version of events, which said the vehicles were “advancing suspiciously” without headlights or emergency signals.