Tragedy struck Las Vegas, last Sunday. A shooting occurred around 10 p.m. during an outdoor country music festival, in which Jason Aldean was performing.
Police said the gunman, Stephan Paddock, 64, started shooting into the public from the 32nd floor of the Mandalay Bay Resort and Casino, killing 59 and injuring more than 500 people.
Police reported they are now investigating Paddock's girlfriend Marilou Danley to see if she knew anything or thought anything like this was going to happen.
Authorities said Paddock had 47 guns in his room and in his car.