The man accused of fatally shooting the CEO of UnitedHealthcare pleaded not guilty on Monday to state murder and terror charges while his attorney complained that comments coming from New York’s mayor would make it tough to receive a fair trial.

Luigi Mangione, 26, was shackled and seated in a Manhattan court when he leaned over to a microphone to enter his plea. The Manhattan district attorney charged him last week with multiple counts of murder, including murder as an act of terrorism.

Mangione’s initial appearance in New York’s state trial court was preempted by federal prosecutors bringing their own charges over the shooting. The federal charges could carry the possibility of the death penalty, while the maximum sentence for the state charges is life in prison without parole.

Prosecutors have said the two cases will proceed on parallel tracks, with the state charges expected to go to trial first. One of Mangione’s attorneys told a judge that the “warring jurisdictions” had turned Mangione into a “human ping-pong ball” and that New York City Mayor Eric Adams and other government officials had made him a political pawn, robbing him of his rights as a defendant and tainting the jury pool.

“I am very concerned about my client’s right to a fair trial,” lawyer Karen Friedman Agnifilo said.

Adams and Police Commissioner Jessica Tisch stood among a throng of heavily armed officers last Thursday when Mangione was flown to a Manhattan heliport and escorted up a pier after being extradited from Pennsylvania.

Friedman Agnifilo said police turned Mangione’s return to New York into a choreographed spectacle. She called out Adams’ comment to a local TV station that he wanted to be there to look “him in the eye and say, ‘you carried out this terroristic act in my city.’”

“He was on display for everyone to see in the biggest stage perp walk I’ve ever seen in my career. It was absolutely unnecessary,” she said.

She also accused federal and state prosecutors of advancing conflicting legal theories, calling their approach confusing and highly unusual.

In a statement, Adams spokesperson Kayla Mamelak Altus wrote: “Critics can say all they want, but showing up to support our law enforcement and sending the message to New Yorkers that violence and vitriol have no place in our city is who Mayor Eric Adams is to his core.”

“The cold-blooded assassination of Brian Thompson — a father of two — and the terror it infused on the streets of New York City for days has since been sickeningly glorified, shining a spotlight on the darkest corners of the internet,” Mamelak Altus said.

State trial court Judge Gregory Carro said he has little control over what happens outside the courtroom, but can guarantee Mangione will receive a fair trial.

Authorities say Mangione gunned down Thompson as he was walking to an investor conference in midtown Manhattan on the morning of Dec 4.

Mangione was arrested in a Pennsylvania McDonald’s after a five-day search, carrying a gun that matched the one used in the shooting and a fake ID, police said. He also was carrying a notebook expressing hostility toward the health insurance industry and especially wealthy executives, according to federal prosecutors.

At a news conference last week, Manhattan District Attorney Alvin Bragg said the application of the terrorism law reflected the severity of a “frightening, well-planned, targeted murder that was intended to cause shock and attention and intimidation.”

“In its most basic terms, this was a killing that was intended to evoke terror,” he added.

Mangione is being held in a Brooklyn federal jail alongside several other high-profile defendants, including Sean “Diddy” Combs and Sam Bankman-Fried.

During his court appearance Monday, he smiled at times when talking with his attorneys and stretched his right hand after an officer removed his cuffs.