Monkey Locksmiths

BAKERSFIELD, California Investigators who looked into the attack by two chimpanzees at a California animal sanctuary last month say the animals' keeper failed to lock two of the three doors on their cage.

They recommended charging the keeper with a misdemeanor. Prosecutors disagreed and did not bring charges.

The keeper, Virginia Brauer, says she was sure she locked a third door holding the chimps in their cage. But she apparently did not know they were capable of unlocking it themselves.

Four chimps escaped the cage and attacked a visitor, ripping off most of his face and tearing off a foot. He remains in a hospital in critical condition.