Vegas gunman studied SWAT tactics, venues

LAS VEGAS (AP) — The Las Vegas gunman meticulously planned the worst mass shooting in modern U.S. history, researching SWAT tactics, renting hotel rooms overlooking outdoor concerts and investigating potential targets in at least four cities, authorities said Friday.

But almost four months after Stephen Paddock killed 58 people and wounded more than 800 others with a barrage of bullets from the Mandalay Bay casino-hotel, investigators still have not answered the key question: Why did he do it?

Clark County Sheriff Joe Lombardo released a preliminary report on the Oct. 1 attack and said he did not expect criminal charges to be filed against Paddock’s girlfriend, Marilou Danley, who had been called the only person of interest in the case. Investigators believe Paddock acted alone, and he did not leave a suicide note or manifesto.

Paddock, who killed himself before police reached him, told friends he always felt ill, in pain and fatigued, authorities said.