Hec Ramsey, one of those old 1970s TV movie series like Columbo. This one stars Richard Boone set in Oklahoma of 1900 or so, so it is a Western. He plays an older lawman who is much like the character of Paladine from Have Gun Will Travel where he uses smarts, science and forensics as much as fisticuffs and gunslinging. He has a trunk with a magnifier to examine rifling on bullets to match the bullet to the murder weapon and a fingerprint set up. It only lasted for 2 seasons and about 20 movie episodes and many have never heard of it.