The mystery of Stephen Paddock — gambler, real estate investor, mass killer

MESQUITE, Nev. - He was 64 years old and, to those who knew him, showed no signs of mental illness, extreme political views or an unhealthy interest in guns. He liked to gamble, and had bounced around over the years, living in Southern California, Texas and Nevada. But he seemed to have plenty of money, and had held steady jobs as a mail carrier, accountant, auditor and apartment manager.

Stephen Paddock's last stop was here, in Mesquite, Nev., a modest desert oasis 80 miles northeast of Las Vegas, where he lived in a retirement community with his female partner and kept a low profile, conversing little and maintaining no Facebook or Twitter accounts.

In an era when social media invites full-throated expression of even the most minor annoyance, Paddock gave away no hint of whatever it was that drove him to commit mass murder on