May 18, 2018 11:37 pm The Fingerprint of a Firearm Every gun leaves a unique fingerprint every bullet fired. And police can analyze those fingerprints to find links between crimes they didn’t even know were related. US & World Videos 11:13 Not this time Knicks fans: The Lineup 0:41 Remains of child found in duffel bag in West Philadelphia identified as missing boy 0:17 Philadelphia will soon ticket parked cars with window tint 2:03 Project HOME receives $1M donation from Phillies Charities in honor of 35th anniversary 2:02 New bathroom police sparking debate over student equality in the Pennridge School District