The judge dismissed two of the four federal counts against Mangione, including murder through use of a firearm, which carried a potential death sentence.

A judge ruled federal prosecutors cannot seek the death penalty for Luigi Mangione, who is scheduled to go on trial later this year for the murder of UnitedHealthcare CEO Brian Thompson.

According to the criminal complaint, Anderson approached the jail intake area around 6:50 p.m. Wednesday and told uniformed jail officers that he was an FBI agent in possession of paperwork "signed by...