Walter Nolan, father of Michael Nolan, is escorted by police officers as he is transported on a stretcher from his home in Brentwood, N.H., Monday May 12, 2014. Brentwood police officer Steven Arkell was allegedly shot to death by Michael Nolan, when he answered a call in a Nolan's suburban neighborhood, according to the New Hampshire Attorney General Joseph Foster. (AP Photo/The Portsmouth Herald)
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