One of the coolest aspects of this job is getting to work with people who are masters in their field. Of course, given my job their field is inherently interesting so you can imagine how fun it is to work with, say, a top-notch firearms analyst.

You know, like Austin P.D.'s Greg Karim.

Two of the things Greg and his colleagues can do include tests to (1) determine whether or not a particular shell casing was fired in a particular gun; and (2) whether or not a particular bullet was fired from a...