spitz's two assistants, michelle waters and christina heisler, prepare the autopsy room and mr. krueger. these two morgue attendants are the first to admit they live for death. >> it's considered taboo, death in general in our society. it used to be that way up until recently but i find it interesting because it is the number one universal in life. 100% of the people die. 100% of the time. >> working in the morgue has taught me that tomorrow's no guarantee. i could walk out that door and get hit by a bus. i can take care of myself, exercise, still might die of a heart attack tomorrow. it's not my choice. >> also here this morning is the investigator who attended yesterday's death scene, renee. she shows dr. spitz the photograph she took of mr. krueger so he can visualize the scene and begin to formulate a hypothesis. >> these are the two steps he fell down. this is the bifold door and there's the wall. no blood, not on his underwear. a little bit but not dripping down his legs. >> so he broke both bifold doors off their hinges? >> yes. >> and then kept going down the stairs and