He threatened to arrest them if they tried to take the shot dog to the vet, too. Blocked their car with his in their driveway and refused to move it. No authority at all for that - any threat that he claimed the dog made was clearly neutralized by the shooting. He just wanted the dog... evidence... dead.
This is some sick sh*t.
Different case. That officer has resigned => http://www.freerepublic.com/focus/f-chat/3185518/posts