From the Africa Geographic website, this is all to common in Africa, hunters shooting captured wild animals in fenced in reserves. The trackers at the reserve will know almost exactly where the Leopard would be and can take the hunter right to it. Sometimes the animals are shot right from the safari vehicle. This is legal in several countries, but trapping the animals and moving them there would not be legal. Not that anyone involved would care.

There were seven wild leopards in a concrete shed at the back of their house. The leopards were separated by two rooms – both of no more than 6m² each. The animals were aggressive, scared and several were injured – it was terrifying. … I had heard a truck late at night leaving and returning, and I was told by two of the workers that Walter would get phone calls from farmers with problem leopards and go to trap them and put them in this shed for American hunters to shoot in hunting season.