Luigi Mangione, accused of fatally shooting UnitedHealthcare CEO Brian Thompson in a brazen midtown Manhattan attack, returns to court Monday as his defense team seeks to suppress key evidence seized during his arrest. The hearing could shape the trajectory of both his state murder case and a separate federal death penalty prosecution.

What to Know:

Mangione , 27, was arrested at a Pennsylvania McDonald’s after a days-long manhunt.

Police recovered a handgun, a loaded magazine, and a notebook from his backpack; the defense argues the search was illegal.

Prosecutors say the gun matches ballistic evidence from the crime scene, and the writings show intent.

Defense attorney Karen Friedman-Agnifilo calls the writings “prejudicial” and objects to the term “manifesto.”

Judge Gregory Carr

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