A Pennsylvania police officer has testified about confronting Luigi Mangione during an intense manhunt last year for UnitedHealthcare CEO Brian Thompson’s killer. Mangione was back in court Tuesday for the second day of a hearing in his bid to bar New York prosecutors from using some key evidence they say links him to last year’s killing of UnitedHealthcare CEO Brian Thompson. Altoona, Pennsylvania, Officer Joseph Detwiler says that as soon as Mangione doffed his medical mask, the officer recognized the shooting suspect whose face had been on the news. The defense is seeking to keep jurors at Mangione's eventual trial from hearing about some evidence. He has pleaded not guilty to state and federal charges.