He asked if he could lock up his 9-year-old black Labrador, named Lady, before letting the officers inside. The Chicago Tribune
describes what happened next:
Police refused the request and came into the house, the lawsuit said. When Lady came loping around the corner with her tail wagging, Officer Richard Antonsen shot the dog, according to the suit, which alleged excessive force, false arrest and illegal seizure for taking the dog's life.
http://news.yahoo.com/blogs/lookout/chicago-police-must-pay-330k-killing-dog-home-200148841.html
