El Jefe was first sighted by cougar hunter and guide Donnie Fenn, along with his 10 year-old daughter, in the Whetstone Mountains on Saturday, November 19, 2011. His hunting dogs chased the animal until it climbed a tree, at which point he took several pictures of it and left to call state wildlife officials. In a news conference organized by the Arizona Game and Fish Department the following Tuesday, Fenn stated that the jaguar, an adult male, climbed down the tree and was chased up a second tree after it had injured some of the dogs in its retreat. The hunter pulled his dogs away, and left the scene. The pictures represent the first evidence of the existence of a wild jaguar in the United States since the death of Macho B in 2009. Several news outlets ran the photos with an article but a