we're back with new details tonight from a florida zoo where a police officer shot and killed an endangered tiger after it bit into a worker's arm. kerry sanders has the latest and a warning that some of you may find this footage disturbing >> reporter: as the naples, florida zoo deputies approach the tiger exhibit, and there through the fence, a man's bloody left arm clenched in a tiger's powerful jaw >> oh, my god. is that real >> oh, my god. >> reporter: investigators say the 26-year-old custodian had gone where he wasn't allowed after hours reaching through the fence to either pet or feed the tiger. a deputy fired a single gunshot the tiger released 26-year-old river rosenquist the big cat named eko retreated, then died eko, an eight-year-old malayan tiger, the rarest of all tiger species.