The judge decided jurors can see the notebook that was found in Mangione's backpack by police in which he allegedly wrote he wanted to 'whack' a senior figure in the health insurance industry.

Viewers will be able to see how the alleged murderer reacts when a judge decides what evidence will be allowed into his state case in New York.

A gun and notebook that prosecutors say link Luigi Mangione to the killing of UnitedHealthcare CEO Brian Thompson can be used as evidence at his murder trial.