Skip t0 4:20. There are shorter versions of this video that show only the shooting, but I think it's important to show the behavior and circumstances leading up to the killing.
LaGRANGE, Mo. (WGEM) -- The LaGrange Police Department is defending
the actions of its officers highly criticized by the community after a
video surfaced on YouTube and Facebook showing its officers shooting an
American Bulldog in the head.
LaGrange Police Chief Dale McNelly told WGEM News the two officers
involved in the shooting of the dog are not currently facing any
citations, but said the St. Louis Humane Society is conducting their own
investigation and the police will be undergoing retraining to learn how
best to handle future situations.
(In fact, the dog's owner settled out of court for $50,000 before a trial could begin. The officers involved are still on the force.)
ETA - probably an archive dupe. Don't care.
ETA2 - Timeline: Incident occurred in 2010. Out-of-court settlement reached in 2013.