The crew and supporting cast members of CSI:NY were filming in a building where a mummified corpse was discovered on Tuesday. The actual filming was happening in a Los Angeles apartment building, where the landlord found one of his tenants had been dead for quite a while. Apparently the guy was behind on rent and, on the day of filming, the landlord decided to make a house call. The body was found two floors below where filming was happening so real police presence apparently didn't disrupt fake police on camera.