Stephen Paddock: silent killer who was a stranger to neighbors

In America's macabre recent history of mass shootings, it has become something of a cliche: the loner who moved silently in his community, never getting too close to neighbors or revealing his hand.Stephen Paddock, the gunman behind the deadliest such attack in modern US history who murdered 59 people in Las Vegas on Sunday, joins that chilling roll call of reclusive killers.Neighbors in Mesquite, a fast-growing casino town on Nevada's border with Arizona, described their shock Tuesday at discov