Sen. Lindsey Graham (R-S.C.) told police officers that he didnt understand why they didnt open fire on rioting Donald Trump supporters who stormed the U.S. Capitol last year, according to a new book.

You guys should have shot them all in the head, Graham is quoted as saying, per excerpts shared by Politico on Friday. The senator, who is often a key ally to the former president, reportedly made the remarks at a meeting with law enforcement four months after the Jan. 6 insurrection in Washington.

We gave you guys guns, and you should have used them, Graham reportedly added. I dont understand why that didnt happen.

Michael Fanone, a former D.C. Metropolitan Police officer who was badly beaten by Trump supporters during the riot, recalled the exchange in the book Hold the Line: The Insurrection and One Cops Battle for Americas Soul, due out Tuesday.

Fanone also recalled Graham threatening to end a meeting with the bereaved mother of a Capitol Police officer Brian Sicknick, who died after the riot right now if she continued to speak badly of Trump.

Graham has not commented on the claims.

Fanone, a one-time Trump voter, has become a fierce critic of Republican hypocrisy over the riot and GOP attempts to downplay the violence. He resigned from the police last year and is now a CNN contributor on law enforcement issues.

Graham routinely condemned Trump before his 2016 election victory but went on to become one of his staunchest supporters. After the riot, Graham said enough is enough on the Senate floor and appeared to cut ties with Trump but hes since cozied back up to the former president.