The Sheriff's department will recognize your LEO instructor's credentials. This is from Jefco County's website ( http://jeffco.us/sheriff/sheriff_T62_R126.htm
) but is mirrored in every county I've checked with.
From their website:
A shooting range or handgun training facility that has a “certified instructor.” A “certified instructor” is an instructor for a firearms safety course who is certified as a firearms instructor by a county, municipal, state, or federal law enforcement agency; the Colorado POST board; a federal military agency; or a national nonprofit organization that certifies firearms instructors, operates national firearms competitions, and provides training, including courses in personal protection, in small arms safety, use, and marksmanship. A certified NRA instructor is acceptable.
The “handgun training class” means: a law enforcement training firearms safety course; a firearms safety course offered by a law enforcement agency, an institution of higher education, or a public or private institution or organization or firearms training school, that is open to the general public and is taught by a certified instructor; or a firearms safety course or class that is offered and taught by a certified instructor.