One store I know of had a B-tech who was practically raping the C-II cabinet for several months with no one noticing. Apparently one of the other staff members turned her in after the girl threatened to accuse her of being the one stealing. There may very well have been multiple hands in the candy jar. It was a case of ridiculous mismanagement and irresponsible staff pharmacists who didn't bother to balalnce the book or didn't care about following up on discrepancies.
One local independent pharmacist was letting patients write C-II scripts in the back room - practicing until their forgery was good enough. He got busted and spent a couple of years in prison. He signed the store over to his son when **** went down, then got his license back by having his son sponsor him upon release.
One girl at my store was taking alot of tramadol via legitimate prescription. She got fired for stealing something from the main store floor. A month later, I noticed that our tramadol counts were off by a few hundred tablets. It's not a controlled drug in this state, but some people sure seek like it is. It probably went her way. But, she's gone, so there isn't much to be done about it but write it off.
Last week a part time pharmacist I know who is pretty new to retail filled a forgery which looked fine on the face. The red flags were up, though. The "patient" was paying cash and was filling for an enormous dose which should have only gone to someone with established narcotic tolerance while making conversation about mot having used narcotics before- except for a couple of Vicodin which hurt his stomach and T3s which didn't work. Sometimes even a meaning pharmacist can get duped. Experience means a bundle, I guess.
It happens enough to notice, but it isn't commonplace.