Ken Bone — aka the “red sweater guy” — claims his son was suspended from school on Thursday and is now being investigated by cops for a photo that shows him firing an assault-style rifle at a shooting range.

The picture was posted by Bone earlier in the week after he caught wind of a Twitter exchange between Marjory Stoneman Douglas student and gun rights advocate Kyle Kashuv and national security lawyer Bradley P. Moss.

The two had been trading verbal jabs over a tweet that Kashuv posted online Monday, in which he claimed to have been “wrongfully questioned” by police for shooting an AR-15 at a gun range — and then sharing footage of it online.

Bone chimed in Tuesday, saying: “Here’s a pic of my son learning to shoot safely under my supervision. Maybe those security guys want to talk to him.”

He posted the image again on Thursday, this time with an update about the police probe.

“Remember this photo from a few days ago?” Bone tweeted. “Well, a school administrator saw it and now my son is suspended from school pending a police investigation.”

The onetime “undecided” voter — who rose to infamy during the 2016 election after he donned his now-legendary red cardigan on stage for a debate question — said he spoke to his son’s principal about the suspension, but didn’t reveal what the outcome of the conversation was.

Bone said his son didn’t even know he was suspended until he got a call from the principal after school.

“Thing is, it wasn’t his Twitter. It was mine,” tweeted Bone. “He does not even have a Twitter account.”

Word of Bone’s claims quickly spread on social media Thursday.