A gunman armed with a pistol opened fire outside a casino in Reno, Nevada, on Monday, killing three people and critically wounding two others before he was shot and badly wounded by police, authorities said.

"From what Matt has told us, he saw the shooter, he saw his friends get hit," said Helene Juceam, Sitler's mom. "He was running and was shot twice." Sitler's life may have been saved by a valet worker who rushed to his side to help.

A Southern California man who survived a mass shooting outside a casino hotel in Reno, Nevada, recalls the terrifying moment the gunman opened fire, killing three people and wounding several others. On July 28,