Who was almost euthanized due to disturbed behavior?
Max, a Malinois used to help U.S. Marines in Afghanistan, is handled by Kyle Wincott  (Robbie Amell) (Marine MWD). Kyle is questioned when weapons seized by his squad go missing. Realizing his friend Tyler Harne is among those involved with the shady dealings, he warns Tyler that he cannot cover for him. The two then go into the battlefield with their squad, with Max on point. While advancing on a suicide bomber, Max is injured by an explosion. In the ensuing gunfight, Kyle is shot and killed.
Kyle's  brother Justin, who makes money selling illegally copied video games, their mother Pamela and their father Ray are informed of his death. After Kyle's body is brought home for burial, the other Marines notice that Max is only calm when he is around Justin, apparently sensing that he is Kyle's brother. The family adopts the dog, who would otherwise be euthanized for his disturbed behavior. Justin initially wants little to do with Max but eventually warms up to him. While meeting up with his friend Chuy, Justin meets Chuy's cousin Carmen, who offers to go to his house and show him some handling tricks for Max. Little by little, Max's behavior improves around other people.
Tyler visits the Wincott's one evening, provoking an aggressive response by Max. Later, after the Fourth of July, Ray asks Tyler what really happened. Tyler implies that Max turned on Kyle and caused him to discharge his weapon on himself, leading to his death. Justin decides to investigate the matter. Calling on one of Kyle's old friends, Sergeant Reyes, for help, he is given a DVD of Kyle training Max that moves him to tears.
Max