On Wednesday, Ellen DeGeneres' television talk show is expected to broadcast the much-anticipated first interview with the Mandalay Bay Resort and Casino security guard, who was the first shooting victim in the Oct. 1 massacre in Las Vegas.

DeGeneres tweeted a photo of Campos holding a cane on the set Tuesday alongside maintenance engineer Stephen Schuck, who was also shot at by the gunman on the 32nd floor of the Mandalay Bay hotel.

The news ended five days of speculation over the whereabouts of the security guard, who was shot as he passed outside gunman Stephen Paddock's hotel room and who holds important information on who knew what and when as the shooting rampage got underway.

Reporters had been looking for Campos to help explain what happened in the moments before Paddock began firing at the crowd assembled for a country music festival opposite the hotel — and how long it took for police to respond.

Shifting timelines given by police and near-total silence from Mandalay Bay's owners have left Campos as one of the only potential sources of first-hand information on how the shooting rampage unfolded and how the hotel responded.