Autopsy fails to find Los Angeles tank death cause - Article Photos 3/10

This still image taken from a security video was released on Feb. 13, 2013, by the Los Angeles Police Department in connection with the search for 21-year-old missing Canadian tourist Elisa Lam. In this image, a woman believed to be Lam enters an elevator in the Cecil Hotel in downtown Los Angeles on Thursday, Jan. 31, the last day she was seen alive. A maintenance worker at the hotel found Lam's body in a water cistern on the building's roof on Feb. 19, more than two weeks after she had gone missing. (AP Photo/Los Angeles Police Department)