An Arizona animal shelter employee was fired Friday after an investigation into the accidental euthanization this week of a hero dog from Afghanistan, the Pinal County Animal Control and Care said.The dog, Target, was brought to the United States from Afghanistan after she alerted soldiers to a suicide bomber in February, saving dozens of lives. She went missing last Friday from the home of Army Sgt. Terry Young, who was among those saved from the bomb.Animal Care and Control received a call about a stray female shepherd-mix dog in the San Tan Valley area on Friday. An animal control officer picked up the dog and brought her to the shelter where the dog stayed over the weekend. The dog was not microchipped or licensed with the county, shelter officials said.