Have to admit it's kind of ironic considering your dad was with the DEA. All laughs aside keep doing what you're doing besides drugs. The agency I worked for which was a state agency required a polygraph test before being accepted into the academy. You'll be assigned a background investigator that will thoroughly look into you and your past. Don't lie about anything if caught doing so you're done, they'll move onto another more honest candidate. If it was merely experimenting and it wasn't anything "heavy" you should be okay. In my book experimenting is a one time thing, but you allude too doing drugs numerous times. Watch the way you word things it could come back to haunt you. We're all humans at the end of the day and we make mistakes, just own up to it.