Ms Garnett stated that two of the four federal charges did not “meet the federal statutory definition of a ‘crime of violence’ as a matter of law.”
Mr Mangione waited outside a hotel and fatally shot Thompson, triggering a five-day manhunt.
The notebook reportedly highlights Mr Mangione’s grievances against corporate executives.
Luigi Mangione, accused of killing UnitedHealthcare CEO Brian Thompson, has resisted extradition to New York.
A search of his backpack revealed a firearm and silencer, both suspected to have been crafted with a 3D printer.
At the time of his arrest, Mr Mangione was reportedly in possession of a firearm and a silencer.
