Attorneys for Luigi Mangione are accusing the federal government of providing “barebones, vague allegations” in their death penalty case against the accused UnitedHealthcare CEO killer. 

In a new court filing, the defense is asking a federal judge to require the prosecution to hand over information surrounding allegations intended to be proven at the sentencing phase of Mangione’s death penalty trial. 

The defense claims prosecutors’ information about various factors – such as the alleged threat to individuals other than the victim and the impact on the victim’s loved ones – “contain only barebones, vague allegations, lacking any information about the facts upon which the government intends to rely,” according to the document. 

Luigi Mangione shouts while officers restrain him as he arrives for his extradition hearing at Blair County Courthouse in Hollidaysburg, Pennsylvania, on Tuesday, Dec. 10, 2024. (David Dee Delgado for Fox News Digital)

The prosecution also points to journal entries and a note addressed to the FBI by Mangione, in which he allegedly rails against the U.S. healthcare system, adding that “these parasites simply had it coming.” 

Mangione faces several federal charges, including alleged murder through use of a firearm and stalking. Additionally, he is facing state charges in a case that is expected to proceed ahead of his federal trial. 

Mangione has pleaded not guilty to all charges. 

The Department of Justice and Mangione’s legal team did not immediately respond to Fox News Digital’s request for comment.