Secretive Life of Las Vegas Shooter Frustrates Investigators

(LAS VEGAS) — The gunman behind the deadliest mass shooting in modern U.S. history led a secret life that has so far thwarted investigators trying to figure out a motive for the attack.

In an effort to try to crack Stephen Paddock's state of mind, the FBI spent hours on Wednesday interviewing his longtime girlfriend, who returned Tuesday from a weekslong overseas trip and said she had no inkling of the massacre he was plotting when he sent her to see family in her native Philippines.