Lead Mangione detective says silencer found in case was unlike anything he'd seen in 25 years

A retired NYPD detective who investigated the assassination of UnitedHealthcare CEO Brian Thompson said in a new interview that the silencer recovered is unlike anything he had previously encountered, underscoring what investigators say was the sophistication and planning behind the slaying. Retired NYPD Detective Sgt. John Griffin told "Dateline" Friday that in 25 years on the job, he'd never seen one before. "It had something on the front, like a homemade suppressor or silencer-type thing," sa