| Inside the ATF's cluttered tracing facility, a group of developers and coders who aid federal agents in tracking down the owners of guns used in crimes are converting digital files into screenshots akin to paper records. Federal agents can run scans on things such as license plates and fingerprints to instantly identify someone. But when it comes to guns, they’re essentially handcuffed by a 1986 law that keeps the ATF stuck in the past. Read more on this story at NBCNews.com and watch NBC Nightly News with Lester Holt tonight at 6:30 p.m. ET/5:30 p.m. CT. | 