http://www.cnn.com/2003/US/South/01/08/shot.dog/

To paraphrase:

Police pull over and arrest a family in their car on vacation, suspecting them of robbery because some money blew off the top of their car from a wallet the father accidentally left on the hood.

While the family is belly-down on the ground, one of their two dogs runs out of the open door (despite the family pleading for the officers to close the doors to prevent this). So the officer shoots the dog in the head.

This is all on videotape. I'm of the opinion that the officer should be shot in the head.