Luigi Mangione's defense challenges backpack search evidence in UnitedHealthcare CEO Brian Thompson murder case, seeking to exclude key trial evidence.

One year has passed since Luigi Mangione, the suspect in the New York killing of UnitedHealthcare CEO Brian Thompson, was arrested in Altoona and later charged with murder. While we continue to follow the developments in Mangione’s case,

Newly released evidence over the weekend included photos of a folding knife, clothing tied to the investigation, a bus ticket under an alias and a handwritten "survival kit" list.

Moments after Luigi Mangione was put in handcuffs at a Pennsylvania McDonald’s, a police officer searching his backpack found a loaded gun magazine wrapped in a pair of underwear.