Close to 20 years ago, we had a 5-6 foot caiman loose in our duck ponds. "Ponds" is a misnomer because it's actually big water behind a dam that collects drainage from the local mountains. The dam is an impoundment for drinking water downstream and everything is managed by the Army Corps of Engineers and the local water district. A water district employee was out in his truck doing regular maintenance and got a picture of the beast in the shallows where we hunt. That pic went onto a lot of bulletin boards but no further reports of sightings.