The Los Angeles Police Department (LAPD), the FBI, and the CIA want to see who is best at catching perps. So a rabbit is released into the forest, and each of them has to catch it.
The CIA goes in. They place animal informants throughout the forest. They question all plant and mineral witnesses. After 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.
The LAPD goes in. They come out two hours later, dragging a bruised mountain lion behind them. The mountain lion is yelling, "Okay! Okay! I'm a rabbit! I'm a rabbit!"