The CIA goes in. They place animal informants throughout the forest. They question all plant and mineral witnesses. After three months of extensive investigation, they conclude that rabbits do not exist.

The FBI goes in. After two weeks with no leads, they burn the forest, killing everything in it — including the rabbit — and make no apologies. Their press release on their “successful operation” notes “The rabbit had it coming.”
The LAPD goes in. They come out two hours later with a badly beaten bear. The bear is yelling, “OK, OK — I’m a rabbit, I’m a rabbit!”