Tucker Carlson said he obtained new evidence showing that Mandalay Bay security guard Jesus Campos traveled to Mexico recently, only returning to the U.S. this week.
He said Campos was seen returning from Baja California Norte into the United States at the San Ysidro, Calif. crossing.
However, previous reports said Campos was wounded by shooter Stephen Paddock who fired a high-caliber round into his leg, which former Secret Service Agent Dan Bongino said would cause marked damage.
Carlson also said one of his producers investigating the background of Campos was gruffly hung up on when he asked law enforcement about the man.
He said it raised one of many questions he has about Campos and the investigation at large.
Carlson said his team tried to find out if Campos was a licensed security guard in the state of Nevada, since little is know about him.
When the state said he was not, Carlson's producer called the Clark County Sheriff's Office to find out what might otherwise be needed to be employed as a security guard there.
The agent "refused to tell [the producer] what is needed" and hung up on him, after saying they don't talk about victims.
Carlson clarified that he supports and respects all law enforcement, but that the incident involving his producer was odd.
He said that other questions have arisen about Campos himself.
"Why did [authorities] let Campos leave the country? How did he manage to travel to Mexico? Was his employer aware that he left the country?"
Carlson also wondered aloud why the employer, Metro-Goldwyn-Mayer - the parent company of Mandalay Bay - has been so restrictive with its information.
He also asked why the public is only finding out now that Paddock's computer was missing its hard drive.
"This story gets murkier by the day, and that is the opposite of what is supposed to happen," Carlson said. "It's obvious there is lying and incompetence at the heart of it."