I posted this in response to another thread, but will repost it here.
Good luck.
Actually, the polygraph is used by the majority of federal and local police departments. NYPD, Philly and Portland are the remaining few that don't. NYPD can't fill classes as it is, and LAPD can't even muster up 24 candidates to make a class since they began using the poly in 2001. Law enforcement aside, I don't know of many fire departments that use the poly.
A poly isn't so cost prohibitive to deter law enforcement agencies from using it. Most have their own civilian polygraphers or detectives who are trained in polygrpahy. The going rate for a poly is $400.
In the vast majority of jurisdictions poly eveidence is per se inadmissible because it doesn't satify the Frye test. There is more discretion in the federal courts, although two circuits still maintain a strict rule of inadmissibility. Poly evidence is per se inadmissible in military trials pursuat to the UCMJ.
A suit for failure to hire based upon a ploy is likley to be dismissed. See Anderson v. City of Philadelphia, 845 F.2d 1216 (1988) In a scenario as ANIMAL describes the Third Circuit Court of Appeals found that there was no liberty interest violation where one was not hired predicated upon a poly. Losing a job one already has because of poly findings is a different issue because there already is a legitimate liberty interest.
Bottom line, you may get flagged on a law enforcement poly for AAS use. By the way CHP uses a CVSA which is even more unreliable than the poly. The question is often worded so broad as to include any illegal drug use. Being off weed for a year before applying is a sure DQ. Very few, if any will hire you if you admit to having smoked weed only a year before. Then again, you might be a good liar and be able to beat the poly, many do.
Karma is appreciated.
RW