An unarmed security guard at Las Vegas' Mandalay Bay Resort and Casino was the first to take on gunman Stephen Paddock, getting shot in the process, but providing crucial help for police looking to stop the massacre. 
 
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 The security guard, identified as Jesus Campos by the International Union, Security, Police and Fire Professionals of America, was shot in the leg after Paddock fired at him through a door, police said. 
 
 Police said Paddock managed to fire off over 200 rounds as the security guard approached the suspect's room alone. But the guard managed to direct police to the exact location of Paddock's suite and even provided a hotel key to officers looking to clear rooms on the 32nd floor before they insisted he get medical attention. 
 
 Reached by phone Wednesday night, Campos told ABC News, "I'm fine." 
 
 The guard who found the shooter and helped bring the massacre to an end said, "I was just doing my job." 
 
 Campos provided information over the phone that helped authorities locate the 32nd-floor room that Paddock was firing from, a spokesperson for the union said. 
 
 Drew Angerer/Getty Images 
 
 Campos was on "random patrol" as a security officer at the hotel when he found the shooter, said Liliana Rodriguez, who identified herself as a coworker of Campos' at Mandalay Bay on a GoFundMe page she set up for him. 
 
 Campos went to investigate a door alarm on the 32nd floor of the hotel when he "came under fire," Las Vegas Metropolitan Police Undersheriff Kevin McMahill said in a press conference Friday. 
 
 McMahill called Campos an "absolute hero" who was "doing his job, diligently." 
 
 "I can tell you that this was a remarkable effort by a brave and remarkable man," McMahill said. "We haven't done a good enough job recognizing his actions." 
 
 Campos was unarmed when he engaged with Paddock, the union spokesperson confirmed, which was first reported by The Daily Beast. 
 
 "Any one of us could have been in the position he was in," Rodriguez wrote. "Most importantly we are a home away from home and at the end of the day we are a team and we should all go home together." 
 
 Speaking Thursday evening, Clark County Sheriff Joseph Lombardo praised Campos, saying he aided officers in their search for Paddock. 
 
 Lombardo added that Paddock fired "well over 200 rounds" into the hallway when the security guard approached. Paddock had set up a camera in the hallway, apparently to watch for approaching authorities. 
 
 "It's amazing" that Campos didn't sustain more injuries, Lombardo said. 
 
 "His bravery was amazing," Lombardo added. "He gave our officers the key card for the room and then continued clearing rooms until he was ordered to go seek attention." 
 
 On Sunday, about 22,000 concertgoers were attending the final night of the Route 91 Harvest Festival on the Las Vegas Strip -- across the street from the Mandalay Bay hotel -- when Paddock began his deadly assault. 
 
 It took authorities just minutes to locate where the bullets were coming from after the attack rang out. Once police breached the door to Paddock's suite on the 32nd floor of the hotel, they found him dead of an apparent self-inflicted gunshot wound. 
 
 A total of 58 people were killed and hundreds were injured in the attack. A motive is still not known, but police said the shooting was "obviously premeditated." 
 
 ABC News' James Hill and Michael DelMoro contributed to this report. ||||| A security vehicle blocks an entrance at the Mandalay Bay Resort and Casino in Las Vegas on October 4. Getty Images/David Becker 
 
 Jesus Campos, the security guard injured in the Las Vegas shooting and lauded by authorities as an "absolute hero" for his efforts assisting police officers, has apparently disappeared. 
 
 In recent days, Campos has fallen off the radar of union leaders, backed out of media interviews, and sparked concern from neighbors who say they have no idea where he is. 
 
 Campos was shot in the leg on October 1 as he approached the door of Stephen Paddock's hotel suite on the 32nd floor of the Mandalay Bay Resort and Casino shortly before Paddock opened fire on thousands of concertgoers attending the Route 91 Harvest festival across the street, according to the latest information from Las Vegas authorities. The massacre ultimately left 58 people dead and hundreds of others injured. 
 
 Campos' disappearance comes amid a wide-ranging investigation into the shooting that has so far yielded more questions than answers and prompted a proliferation of conspiracy theories. Investigators have still not determined a motive for Paddock's deadly rampage, and Las Vegas authorities have changed their version of the shooting's timeline multiple times. 
 
 Officials said Campos was "absolutely critical" to the police response to the shooting by notifying his dispatch immediately and advising officers as they arrived. 
 
 Yet as union leaders sought to coordinate interviews between Campos and multiple news outlets, Campus suddenly vanished. 
 
 David Hickey, the president of the Security, Police, and Fire Professionals of America union, told media that he was with Campos in a Las Vegas hotel suite on Thursday, ahead of scheduled interviews with CNN, ABC, NBC, CBS, and Sean Hannity's show on Fox News. 
 
 But Hickey said Campos abruptly left the suite while Hickey was meeting in a separate room with representatives from MGM Resorts, the Mandalay Bay's parent company. Another union member told Hickey that Campos was taken to a health clinic, but Hickey was unable to reach him. 
 
 "We have had no contact with him," Hickey told the Los Angeles Times, adding: "Clearly, somebody knows where he is." 
 
 A representative for UMC Quick Care, where Hickey said he was told Campos went, told Fox News they hadn't heard anything about the security guard visiting any of the clinic's eight locations in the Las Vegas area. 
 
 When Times reporters visited Campos' reported address over the weekend, they found an armed private security guard, who declined to say who had hired him, and three "no trespassing" signs on the fence and house. 
 
 "Nobody knows where he is," Campos' neighbor Jaime Ruano told the Times, adding that Campos was "a hero." 
 
 On Friday, Sheriff Joe Lombardo of the Las Vegas Metropolitan Police Department told media that Paddock most likely shot Campos around 10:05 p.m., moments before Paddock opened fire on the crowd of concertgoers through the smashed-out windows of his 32nd-floor suite. 
 
 Days earlier, Las Vegas authorities said Campos had been shot at 9:59 p.m., prompting speculation over why six minutes had supposedly elapsed between that shooting and when Paddock carried out his massacre. In his Friday news conference, Lombardo said that the 9:59 p.m. timestamp had been derived from a "human entry into a security log" and that the information was no longer considered accurate. 
 
 Lombardo also assailed accusations that law-enforcement officials were either covering up details of the shooting or had been mistaken because of ineptitude. 
 
 "In the public space, the word 'incompetence' has been brought forward, and I am absolutely offended with that characterization," he said. 
 
 Las Vegas authorities have since sought to shut down speculation about Campos' role in the shooting. 
 
 "[Campos] is not missing. He's not under arrest," Larry Hadfield, a Las Vegas police officer, told the fact-checking website Snopes. "We tell people what we know. If they don't believe it but they're going to believe whatever website, then I don't know what else to tell you." ||||| The Mandalay Bay security guard who disappeared last week moments before he was scheduled to break his silence in television interviews has not been heard from since he went to a walk-in health clinic, his union president said. 
 
 David Hickey of the Security, Police, and Fire Professionals of America (SPFPA) told reporters Friday that he got a text the night before saying Jesus Campos was taken to a UMC Quick Care facility, though he did not specify where or whom the text came from. 
 
 A spokesperson at the UMC Quick Care, which has eight locations throughout the Las Vegas area, told Fox News on Monday that they had "heard nothing" about Campos visiting them. 
 
 Multiple requests from Fox News for SPFPA to comment on the matter were not returned Monday. 
 
 Hickey said he was meeting with MGM officials Thursday afternoon in the hours before Campos’ scheduled television appearances, including one with Fox News. 
 
 LAS VEGAS SECURITY GUARD JESUS CAMPOS DISAPPEARS MOMENTS BEFORE TV INTERVIEWS 
 
 But when the meeting ended, Campos had fled. 
 
 "For the past four days he's been preparing ... we had a meeting with MGM officials, and after that meeting was over, we talked about the interviews, we went to a private area, and when we came out, Mr. Campos was gone," Hickey told reporters, according to Fox 5 Las Vegas. 
 
 Hickey said Campos had requested to go public and wanted to tell his story and move on from the Oct. 1 shooting investigation. Police say he was shot just before the crazed gunman killed 58 at music festival on the Las Vegas Strip – though the sequence of events is still in dispute. 
 
 Campos was last photographed in public on Oct. 10, accepting an “SPFPA Hero Award” for bravery in the line of duty, while dining with Hickey and others at a high-end Vegas steakhouse. But soon afterward, investigators said that the security guard was shot before the massacre, raising questions about whether the hotel did enough to prevent the bloodshed. 
 
 Hickey has said that before he vanished, Campus was looking forward to telling his side of the story. 
 
 "Right now I'm just concerned where my member is, and what his condition is. It's highly unusual,” Hickey said Friday. “I'm hoping everything is OK with him and I'm sure MGM or the union will let (media) know when we hear something," he said. 
 
 Fox News' Greg Norman contributed to this report.
– One of the most amazing stories of heroism to emerge from the Las Vegas mass shooting is that of Jesus Campos, an unarmed security guard who was the first to locate gunman Stephen Paddock. Union chief Dave Hickey says Campos arrived at the 32nd floor of the Mandalay Bay hotel by elevator because Paddock had apparently barricaded the stairwell doors, the Daily Beast reports. He was shot in the leg after trying to open the door of Paddock's hotel room, which had also been barricaded. The injured guard, who was carrying only a baton, radioed dispatch and told them where the shooter was. Clark County Sheriff Joe Lombardo says that after Campos approached, Paddock stopped shooting at the crowd below and fired more than 200 rounds into the hotel hallway, the Telegraph reports. The guard's "bravery was amazing," Lombardo says. "He gave our officers the key guard for the room and then continued clearing rooms until he was ordered to go seek attention." Campos is scheduled to undergo surgery to remove the bullet in his leg. "I'm fine," he tells ABC. "I was just doing my job." A GoFundMe campaign a co-worker started for Campos has raised almost $6,000. President Trump praised Campos during his visit to Las Vegas Wednesday, saying: "He did a good job, didn't he?"