On October 1, 2017, 59 people were killed and 500 were injured when a gunman opened fire at a country music festival in Las Vegas, Nevada. The whole event was held at the Route 91 Harvest Festival on the Las Vegas strip. Most people fled for their lives, while others got on the ground and tried to take cover.

The suspect was a 64-year-old man named Stephen Paddock. Paddock owned multiple apartment complexes in various states. He was able to make millions through real estate. Paddock didn’t have any prior run-ins with the police, however, his father, Benjamin Paddock was on the FBI’s Top Ten Most Wanted fugitives list from 1969 to 1977.

Police had found at least 20 rifles in the room; some guns among these weapons were AR-15 rifles, 2 of which were equipped with scopes, set up on tripods. The tripods had been set up by a window that had been smashed to bits by a sledgehamer.

While Stephen Paddock’s motives are unclear, terrorist group ISIS had claimed responsibility. Even though that statement is questionable, there are some other reasons for his actions as well. A few theories include gambling debts, casino grudges, and a mental illness inherited from his father. It is possible that he didn’t act alone, but the investigation is still ongoing.

Sources by NBC News and New York Times.