Police say the suspect had a ghost gun, possibly made with a 3D printer, when he was arrested on Monday. Here's what to know about the increasingly widespread weapons and efforts to regulate them.

A black pistol found in the backpack of UnitedHealthcare shooting suspect Luigi Mangione appeared to have been a ghost gun, police said.

In Manhattan, a shocking crime has put the spotlight on the rising threat of ghost guns. On December 4, Brian Thompson, the CEO of UnitedHealthcare, was shot dead in the heart of New York City. The weapon used in this brutal act?

A government report revealed the number of ghost firearms recovered by police in criminal cases rose 1,000% from 2017 to 2021.

The NYPD says murder suspect Luigi Mangione's ghost gun may have been 3D printed. Former U.S. attorney Joyce Vance and former associate deputy director for the ATF Tom Chittum join Chris Jansing to provide more insight on the investigation.

The ghost gun allegedly in Luigi Mangione's possession when he was arrested has been matched to three shell casings recovered at the crime scene in New York.

The Maine Gun Safety Coalition is asking state lawmakers to ban ghost guns after an untraceable firearm was used by the alleged UnitedHealthcare CEO shooter. Firearms known as “ghost guns” do not have a serial number as they are usually constructed at home with a kit or with the assembly of separate pieces.