Handgun, silencer and 'manifesto' among items in Luigi Mangione's backpack during arrest, police say

Items found in Luigi Mangione's backpack when he was arrested in Pennsylvania last year include a handgun, a silencer, a magazine with bullets wrapped in underwear and a red notebook that an officer called a "manifesto."The second week of a complex pretrial hearing kicked off Monday in Manhattan Criminal Court with a focus on the moments leading up to the 27-year-old's arrest in the murder of UnitedHealthcare CEO Brian Thompson.

Items found in Luigi Mangione's backpack when he was arrested in Pennsylvania last year include a handgun, a silencer, a magazine with bullets wrapped in underwear and a red notebook that an officer called a "manifesto."

The second week of a complex pretrial hearing kicked off Monday in Manhattan Criminal Court with a focus on the moments leading up to the 27-year-old's arrest in the murder of UnitedHealthcare CEO Brian Thompson. The hearing is about whether any evidence or statements were obtained illegally and should be excluded from trial.

During Monday's proceedings, Mangione entered the courtroom wearing a dark gray suit over a blue dress shirt, taking a second to scan the room before taking his seat. He chatted with his attorneys animatedly before court was called to order.

Altoona Police Officer Christy Wasser testified Monday that she responded on Dec. 9 to a call about a suspicious person at a McDonald's. Body camera video from the arrest was played in court and showed Wasser searching Mangione's backpack.

When another officer asked Mangione if there was anything in the bag that they needed to be aware of, he responded, “I wish to remain silent," the video shows. Wasser said she was concerned that there was a bomb in the backpack.