“ Late Show ” host Stephen Colbert on Thursday teased Pete Hegseth with a blast from the past after the Pentagon’s watchdog found the defense secretary’s use of the Signal messaging app risked “potential compromise of sensitive DoD information, which could cause harm to DoD personnel.”

The inspector general report was highly critical of Hegseth, saying that the secretary’s use of Signal put U.S. troops and the mission in danger.

Defense Secretary Pete Hegseth has seven kids between his ex-wife, Samantha Deering, and his wife, Jennifer Hegseth. Here's everything to know about Pete Hegseth's kids.

Hegseth finds himself in hot water over legally murky airstrikes on suspected drug smugglers at sea. A follow-up attack on survivors of one such attack is now generating accusations of a possible war crime. Hegseth said an admiral ordered the second launch.

Hegseth has faced major backlash after news reports found that the U.S. authorized a second strike in the Caribbean that killed two men in the water who survived the initial attack on an alleged drug boat. While Hegseth initially said the Washington Post report was “fake news,” the White House confirmed on Monday that the second strike happened.

Hegseth has denied issuing a “kill everybody” instruction for the Sept. 2 strikes, and during the briefing on Capitol Hill, Adm. Bradley also vehemently denied that Hegseth ordered his subordinates to “kill everybody” aboard the vessel.

Hegseth responded to the Democrats’ video by publishing a tweet last week that said Kelly, a retired Navy fighter pilot, was facing investigation because he is the only one in that group who formally retired from the military and remains under the Pentagon’s jurisdiction.