It is not illegal to lure animals out of the reserve according to Heavy.com. What was illegal was not having a permit to kill a lion that year. From what I read the Dr. was told after the lure (for another type of animal) that it was ok to take the shot. The professional guide was at fault for advising to take the shot on the lion and perhaps later trying to remove the tracker collar.
Not a good showing all around, like I said. This is being turned into another 'confederate killing of a black church'. This will result in all Big Game hunters having their culture reduced and more frowning on hunting in general.