I understand feeling like someone is impaired and not being able to do anything about it. It's worse when there is only "hearsay" evidence and really very little you can do. You feel angry and powerless and worry for the patients. The truth is all you CAN do is report it and watch for anything in the future. We have a nurse who is a consistently poor performer, always on the cellphone, going missing on the floor, signing things that clearly were not done, ignoring patients in pain, staying late just to drain the clock, etc. This person also meets people from other departments in the parking lot, has a ton of documentation holes, doesn't chart PRNs, and has been found with a pill in the pocket. I would bet my job that there are drugs missing, and all the signs are there. But all I can do is give it to the higher ups and let it be, because suspicion is only worth reporting, not worth causing someone to lose their job.