Lawyers for Luigi Mangione have asked a New York federal judge to dismiss some criminal charges, including the only death penalty count, over the alleged murder of UnitedHealthcare's chief executive.

In papers filed in Manhattan federal court, the lawyers said prosecutors should also be prevented from using at trial his statements to law enforcement officers and his backpack where a gun and ammunition were found.

They said Mangione was not read his rights before he was questioned by law enforcement officers, who arrested him after Brian Thompson was fatally shot last December.

They added that officers did not obtain a warrant before searching Mangione's backpack.

Mangione, 27, has pleaded not guilty to state and federal charges in the fatal shooting of Thompson as he arrived at a Manha

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