1, 2018. Kelly West/AFP via Getty Images Ghost guns assembled from parts kits purchased online or manufactured by at-home 3D printing have increasingly turned up in high-profile attacks and mass ...

A ghost gun is a firearm without a serial number, making it nearly impossible for authorities to trace back to its maker or owner. These guns are typically assembled privately, either from kits ...

Deep inside headquarters of the Baltimore Police Department, a vault holds thousands of artifacts from a generation of gun crime and clues to a tide that may be turning. Most of the firearms ...

ABC News’ Devin Dwyer reports on "ghost guns" -- untraceable weapons made from do-it-yourself kits or 3D printers -- that are increasingly finding their way into the hands of teens and felons.

The New York Police Department thinks a ghost gun was used in the crime. In recent years, the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) says part kits have become more accessible.