RE: .22 caliber
If you read the 2005 Game Violation summary for the Colorado Division of Wildlife, you will find a deer that was illegally killed with a .22 pellet gun...
Also, don't miss the fellow that shot a bull elk, in the presence of a DOW officer, and claimed it was a bull moose. The office gutted the animal with the offender, and when transporting the carcass back to the offender's truck, found another elk carcass in the bed, the shooter claimed it was an antelope...