Dude trust me, my background wasn't even close to flawless, and they are spending money on me. Marijuana should be the least of your concerns. Now the question is when did you do this experimenting? I did it a few times when I was 13 or 14 I'm really not sure to this day, however time passed is forgiveness. Some departments like Miami Beach will not even take you for taking one puff. You might want to check your departments drug policies. I went to apply for Miami Beach and spoke with a recruiter, and told me not even to bother with the app, he then referred me to MDPD. If you get passed you interview and they send you for something, they are interested. Be honost and do not lie, you will be caught. Then you risk the chance of not being hired throughout the nation. Don't sweat it.
Written: April 12, 2006 Passed 96%
Applied: June 10, 2006
Orientation/Interview: September 28, 2006
Pollygraph: October 17, 2006 PASSED
Processing: December 21, 2006 Complete
Oral Board Assessment: February 19, 2007 Awaiting