How an 'ugly,' unwanted weapon became the most popular rifle in America During Paddock’s stay at the hotel, room service and housekeeping “had contact with Paddock or entered his suite more than 10 times,” according to a statement sent to CNN from MGM Resorts International, which owns the Nevada hotel. The Las Vegas Review-Journal first reported the extent of the hotel staff’s interactions with the gunman. Paddock opened fire from his 32nd-floor hotel room onto a crowd attending an outdoor country musical festival. He killed himself before police breached his hotel room door.Hotel staff performs a welfare check “after two consecutive days where a Do-Not-Disturb sign has been displayed on the door,” the MGM Resorts statement said, “and the guest has not interacted in-person or by phone with housekeeping or other hotel staff over the same period.”Read More”In addition, our staff reserves the right to enter the room if it is deemed appropriate to conduct a welfare check.” Photos: Worst mass shootings in the United StatesInvestigators work at the scene of a mass shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday, November 5. A man opened fire inside the small community church, killing at least 25 people and an unborn child. The gunman, 26-year-old Devin Patrick Kelley, was found dead in his vehicle. He was shot in the leg and torso by an armed citizen, and he had a self-inflicted shot to the head, authorities said.Hide Caption 1 of 20 Photos: Worst mass shootings in the United StatesA couple huddles after shots rang out at a country music festival on the Las Vegas Strip on Sunday, October 1. At least 58 people were killed and almost 500 were injured when a gunman opened fire on the crowd. Police said the gunman, 64-year-old Stephen Paddock, fired from the Mandalay Bay hotel, several hundred feet southwest of the concert grounds. He was found dead in his hotel room, and authorities believe he killed himself and that he acted alone. It is the deadliest mass shooting in modern US history.Hide Caption 2 of 20 Photos: Worst mass shootings in the United StatesPolice direct family members away from the scene of a shooting at the Pulse nightclub in Orlando in June 2016. Omar Mateen, 29, opened fire inside the club, killing at least 49 people and injuring more than 50. Police fatally shot Mateen during an operation to free hostages that officials say he was holding at the club.Hide Caption 3 of 20 Photos: Worst mass shootings in the United StatesIn December 2015, two shooters killed 14 people and injured 21 at the Inland Regional Center in San Bernardino, California, where employees with the county health department were attending a holiday event. The shooters, Syed Rizwan Farook and his wife Tashfeen Malik, were later killed in a shootout with authorities. The pair were found to be radicalized extremists who planned the shootings as a terror attack, investigators said.Hide Caption 4 of 20 Photos: Worst mass shootings in the United StatesPolice search students outside Umpqua Community College after a deadly shooting at the school in Roseburg, Oregon, in October 2015. Nine people were killed and at least nine were injured, police said. The gunman, Chris Harper-Mercer, committed suicide after exchanging gunfire with officers, a sheriff said.Hide Caption 5 of 20 Photos: Worst mass shootings in the United StatesA man kneels across the street from the historic Emanuel African Methodist Episcopal Church in Charleston, South Carolina, following a shooting in June 2015. Police say the suspect, Dylann Roof, opened fire inside the church, killing nine people. According to police, Roof confessed and told investigators he wanted to start a race war. He was eventually convicted of murder and hate crimes, and a jury recommended the death penalty.Hide Caption 6 of 20 Photos: Worst mass shootings in the United StatesPolice officers walk on a rooftop at the Washington Navy Yard after a shooting rampage in the nation’s capital in September 2013. At least 12 people and suspect Aaron Alexis were killed, according to authorities.Hide Caption 7 of 20 Photos: Worst mass shootings in the United StatesConnecticut State Police evacuate Sandy Hook Elementary School in Newtown, Connecticut, in December 2012. Adam Lanza opened fire in the school, killing 20 children and six adults before killing himself. Police said he also shot and killed his mother in her Newtown home. Hide Caption 8 of 20 Photos: Worst mass shootings in the United StatesJames Holmes pleaded not guilty by reason of insanity to a July 2012 shooting at a movie theater in Aurora, Colorado. Twelve people were killed and dozens were wounded when Holmes opened fire during the midnight premiere of “The Dark Knight Rises.” He was sentenced to 12 life terms plus thousands of years in prison. Hide Caption 9 of 20 Photos: Worst mass shootings in the United StatesA military jury convicted Army Maj. Nidal Hasan of 13 counts of premeditated murder for a November 2009 shooting rampage at Fort Hood, Texas. Thirteen people died and 32 were injured.Hide Caption 10 of 20 Photos: Worst mass shootings in the United StatesJiverly Wong shot and killed 13 people at the American Civic Association in Binghamton, New York, before turning the gun on himself in April 2009, police said. Four other people were injured at the immigration center shooting. Wong had been taking English classes at the center.Hide Caption 11 of 20 Photos: Worst mass shootings in the United StatesPallbearers carry a casket of one of Michael McLendon’s 10 victims. McLendon shot and killed his mother in her Kingston, Alabama, home, before shooting his aunt, uncle, grandparents and five more people. He shot and killed himself in Samson, Alabama, in March 2009.Hide Caption 12 of 20 Photos: Worst mass shootings in the United StatesVirginia Tech student Seung-Hui Cho went on a shooting spree on the school’s campus in April 2007. Cho killed two people at the West Ambler Johnston dormitory and, after chaining the doors closed, killed another 30 at Norris Hall, home to the Engineering Science and Mechanics Department. He wounded an additional 17 people before killing himself.Hide Caption 13 of 20 Photos: Worst mass shootings in the United StatesMark Barton walked into two Atlanta trading firms and fired shots in July 1999, leaving nine dead and 13 wounded, police said. Hours later, police found Barton at a gas station in Acworth, Georgia, where he pulled a gun and killed himself. The day before, Barton had bludgeoned his wife and his two children in their Stockbridge, Georgia, apartment, police said.Hide Caption 14 of 20 Photos: Worst mass shootings in the United StatesEric Harris, left, and Dylan Klebold brought guns and bombs to Columbine High School in Littleton, Colorado, in April 1999. The students gunned down 13 and wounded 23 before killing themselves.Hide Caption 15 of 20 Photos: Worst mass shootings in the United StatesIn October 1991, George Hennard crashed his pickup through the plate-glass window of Luby’s Cafeteria in Killeen, Texas, before shooting 23 people and committing suicide.Hide Caption 16 of 20 Photos: Worst mass shootings in the United StatesJames Huberty shot and killed 21 people, including children, at a McDonald’s in San Ysidro, California, in July 1984. A police sharpshooter killed Huberty an hour after the rampage began.Hide Caption 17 of 20 Photos: Worst mass shootings in the United StatesPrison guard George Banks is led through the Luzerne County courthouse in 1985. Banks killed 13 people, including five of his children, in Wilkes-Barre, Pennsylvania, in September 1982. He was sentenced to death in 1993 and received a stay of execution in 2004. His death sentence was overturned in 2010.Hide Caption 18 of 20 Photos: Worst mass shootings in the United StatesOfficers in Austin, Texas, carry victims across the University of Texas campus after Charles Joseph Whitman opened fire from the school’s tower, killing 16 people and wounding 30 in 1966. Police officers shot and killed Whitman, who had killed his mother and wife earlier in the day. Hide Caption 19 of 20 Photos: Worst mass shootings in the United StatesHoward Unruh, a World War II veteran, shot and killed 13 of his neighbors in Camden, New Jersey, in 1949. Unruh barricaded himself in his house after the shooting. Police overpowered him the next day. He was ruled criminally insane and committed to a state mental institution.Hide Caption 20 of 20Mandalay Bay staff had “numerous interactions with Stephen Paddock every day at the resort,” the statement said, “including a room service delivery and a call with housekeeping on October 1, all of which were normal in nature.” “As a result of these interactions, there was no need to conduct a welfare check,” it said.In the aftermath of the mass shooting — the deadliest in modern US history — questions arose over how Paddock had not raised the suspicions of hotel staff. Police found 23 guns inside his suite and discovered Paddock brought “in excess of 10” suitcases to the room over several days, according to Las Vegas Metropolitan Police Department Sheriff Joseph Lombardo. Remember when banning bump stocks was a thing?Since the shooting, more than 450 people have filed lawsuits against MGM Resorts; Mandalay Corp.; Live Nation Entertainment, which promoted the music festival; Slide Fire Solutions, maker of the bump stock devices Paddock used in the shooting, and the gunman’s estate. Many of the victims who have filed claims have questioned how the hotel staff didn’t notice anything unusual about Paddock’s behavior. Housekeepers “saw no signs of anything” suspicious in the suite, US Rep. Dina Titus, D-Nevada, told CNN in October.