Tags: Manhattan

A Utah man who pledged to conduct a mass killing, saying he was Adolf Hitler "reincarnated," was a discharged former military cadet.

A federal complaint revealed more details about a notebook Luigi Mangione, 26, had with him when was arrested for allegedly shooting UnitedHealthcare CEO Brian Thompson on Dec. 4 in Manhattan.

The organizers of the fundraising page stated that they sent a letter to Mangione, offering him the money along with comments of support.