(NewsNation) — Luigi Mangione, the man accused of fatally shooting UnitedHealthcare CEO Brian Thompson, is set to appear at a court hearing in New York City on Friday.

Prosecutors and defense attorneys are expected to check in with the court to determine their status in the case.

This will be Mangione’s first court appearance since December, when the 26-year-old was charged with first-degree murder and killing as an act of terrorism. He has pleaded not guilty to all charges.

In addition to the state charges, Mangione faces federal charges that could carry the possibility of the death penalty.

Authorities say Mangione shot and killed Thompson as he was walking to an investor conference in midtown Manhattan on Dec 4.

He was arrested in Pennsylvania after a five-day search and was extradited to New York City.

He is currently being held at the Brooklyn Metropolitan Detention Center.

Luigi Mangione gives public statement

This week,Mangione issued a statement, thanking the estimated thousands who have written him while he has been behind bars.

In the statement posted on a website that was set up by his defense attorney, Mangione said he is “overwhelmed by and grateful for everyone who has written to share their stories and express their support.”

“Powerfully, this support has transcended political, racial, and even class divisions, as mail has flooded MDC from across the country, and around the globe,” Mangione said.

Mangione got one of his largest donations from an anonymous donor, citing President Donald Trump’s executive order on the death penalty as their reason for giving. The donor said the death penalty should “not be politicized.”

“I am also concerned about the severe infringement on the defendant’s right to a fair trial and due process, since his juries are effectively pre-tainted,” the donor said.

The Associated Press contributed to this report.