The motive of Las Vegas gunman Stephen Paddock remains a mystery four days after he committed the deadliest mass shooting in American history. However, the FBI is following up on a number of theories, FBI special agent Aaron Rouse said during a press briefing in Las Vegas Wednesday night.
Rouse didn't specify exactly what theories were being investigated, but one under consideration by some pundits is that the shooting was politically motivated. Others are convinced that he became radicalized after converting to Islam.
Or perhaps Paddock, the son of a criminal psychopath, was always a ticking time bomb.
Paddock is a tough nut to crack because he kept a very low profile and apparently had no social media accounts. According to Clark County Sheriff Joseph Lombardo, he lived a "secret life" and amassed a large arsenal of weapons and ammunition over several decades.