The Guinness Book has certified this record:
Largest crocodile in captivity: "The largest crocodile in captivity is Lolong, a saltwater crocodile (Crocodylus porosus), who measured 6.17 m (20.24 ft) in Agusan del Sur Province of Mindanao, Philippines. He was measured by experienced handlers in his custom built enclosure at Bunawan Eco-Park and Research Centre, Philippines. Lolong's weight was also measured at a nearby truck weigh-bridge and verified as approximately 1075 kg (2370 lbs).
The capture of the crocodile came after a 2 year effort to remove the animal thought responsible for a young girl's death at Agusan Marsh in early March 2009, and later the disappearance of a fisherman close to Bunawan Village."
We'll soon be running an in-depth piece on giant crocs, present and prehistoric, by Hodari Nundu.
Thanks to Dee for the news tip.