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It's been four months since the Las Vegas massacre, and there are still many unanswered questions about the deadliest mass shooting in modern U.S. history, which left 59 people dead and hundreds wounded.

"Tucker Carlson Tonight" has been following new developments in the investigation, including the Clark County coroner's refusal to release the autopsy of gunman Stephen Paddock.

The coroner claims the autopsy is still being finalized, even after all this time, Carlson reported on Tuesday night.

Forensic pathologist Dr. Michael Baden said he can't think of a reason why the autopsies of 58 victims were released due to a court order, but Paddock's was not.

Carlson noted that investigators have already said Paddock was the lone gunman and lone person in his suite on the 32nd floor of the Mandalay Bay hotel, and he died of a self-inflicted gunshot wound.

"Those seem like the key questions," he said, wondering what motive there could be for "hiding the autopsy."

Baden said autopsy results might not be immediately released if they are critical to an ongoing investigation, but that seems unlikely in this case given the known facts.

He added that autopsy results also might not be released if a chemical analysis still needs to be conducted.

"But in this situation, the time has passed now since any toxicological examination could have been done," Baden said. "It's unlikely that there's a really good reason not to release the Paddock [autopsy] to the next of kin, not necessarily to the public."

"There's something weird going on," Carlson said.

Watch more above.

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