A Massachusetts prosecutor dramatically pointed a disgraced cop’s gun and pulled the trigger in court Thursday — as he argued she is a “liar” for claiming she never trained her pistol on a fellow officer.

Prosecutor James Gubitose pointed North Andover Police Officer Kelsey Fitzsimmons’ weapon toward the front of the courtroom and squeezed the trigger, causing a “click” sound, as he claimed her testimony at her assault trial couldn’t be true.

Gubitose alleged Fitzsimmons, 29, tried to shoot her colleague Officer Patrick Noonan, and didn’t only because the gun jammed.

The face-off happened at Fitzsimmons’ North Andover home on June 30, 2025, when Noonan and two other officers were serving her with a surprise restraining order from her fiancé — which temporarily took away her 4-month-old son and her dog.

Gubitose claimed Fitzsimmons lied on the witness stand Wednesday when she denied “tap racking” the gun twice, eventually getting a round in the chamber — prompting Noonan to shoot her in the chest.

There was a bullet in the chamber of Fitzsimmons’ weapon when a cop at the scene ejected the round into a black box after the confrontation, which Gubitose claimed proved she lied by denying banging the gun to get it unjammed. A photo of the disassembled gun parts in the black box was displayed in the courtroom as he spoke.

“She put a round in that chamber,” Gubitose said. “That’s the only way it got there. She got up on that stand and she lied to you.”

Meanwhile, defense attorney Timothy Bradl blasted Noonan’s “Rambo” version of events as inconsistent and “sloppy.”

He claimed it was obvious that Fitzsimmons had planned to kill herself and never meant to harm anyone else. Noonan breached protocol by shooting Fitzsimmons as she was in the middle of trying to take her own life and he needed to cover that up, Bradl argued.

Judge Jeffrey Karp, rather than a jury, is deciding whether Fitzsimmons is guilty on a single count of assault with a deadly weapon.