Try John Sandford's, "Prey" series. Your library should have it. Major best sellers. About a Minneapolis asst. police chief and his cronies. The author either does own guns or reads about them somewhat. He's no Donald Hamilton (the old Matt Helm series), but is easily the best of the modern police procedural writers, save for Cornwell, who was somewhat antigun in her early books, but became a knowledgeable gun owner. She's also been through courses at the FBI Academy. I believe she's also a licensed helicopter pilot. She writes the Dr. Kay Scarpetta series, about the Chief Medical Examiner of the Commonwealth of Virginia. Her latest (not a novel) is an attempt to document the real identity of Jack the Ripper, using modern forensic technique, and consulting a number of criminalistics experts. Should be in book stores now.
Lone Star