Luigi Mangione pumps fist in court as body cam allegedly reveals loaded magazine found inside wet underwear

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

As Wasser held up the magazine with bullets inside, someone can be heard saying, "it's f------ him."

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.

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.

"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.