Luigi Mangione pumped his fist in court Monday as body-camera footage allegedly showed officers finding a loaded magazine tucked inside wet underwear in the suspected assassin’s backpack.

Mangione returned to Manhattan Criminal Court on Monday morning for day 5 of hearings to determine whether some evidence will be excluded from his trial. Mangione is accused of murdering UnitedHealthcare CEO Brian Thompson in December 2024.

Body camera video aired in court showed Altoona, Pennsylvania, Police Officer Christy Wasser, searching through Mangione’s backpack when he was arrested and allegedly finding a magazine with bullets wrapped in wet underwear that was inside the alleged assassin’s backpack.

“There was another magazine hidden in his underwear,” Wasser can be heard saying.

911 CALL FOR LUIGI MANGIONE’S ARREST IN MCDONALD’S RELEASED: ‘HE LOOKS LIKE THE CEO SHOOTER’

As Wasser held up the magazine with bullets inside, someone can be heard saying, “it’s f—— him.”

Mangione was arrested at a McDonald’s in Altoona, Pennsylvania, on Dec. 9, 2024. An employee at the fast-food restaurant reportedly recognized Mangione and told a co-worker, who then alerted the police. He faces numerous state and federal charges in relation to the alleged murder.

The suspected assassin’s lawyers are asking the judge to suppress evidence that was taken from his backpack following the arrest, in addition to statements he gave to police when he was taken into custody at the McDonald’s.

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Mangione’s lawyers argued Fourth and Fifth Amendment concerns, which protect against unreasonable searches and seizures as well as the right to due process. Prosecutors say that police acted within the law, arguing that the warrantless search of Mangione’s bag after his arrest was legal, adding that the only non-Mirandized statement he gave was allegedly giving officers a fake name.

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Last week, prosecutors released the 911 call which led to Mangione’s arrest in Pennsylvania. 

“I’m a manager at Plank Road McDonald’s out here on the boulevard,” a McDonald’s manager told the 911 dispatcher. “And I have a customer here, that some other customers were suspicious of, that he looks like the CEO shooter from New York.”

Fox News Digital’s Michael Ruiz contributed to this report.