Detailed text transcripts for TV channel - MSNBC - 20190113:11:32:00
And just about then -- >> the sergeant for the district attorney's office just happened to call me and ask, hey, did you ever look in that gun case? was there shell casing or anything in that gun case? >> reporter: turns out the gun's manufacturer includes a test-fired shell casing with each gun it sells. so the detective went to the evidence locker, he said, retrieved the gun case. >> looked inside and there was a casing. >> reporter: big moment. >> big moment. >> reporter: big moment because when ballistics tested that shell casing -- >> it was a match. that shell casing was fired from the s...