Think about this...a pharmacist who works with drugs everyday goes to the Federal building where there are drug & bomb sniffing dogs. Wouldn't that person be stopped if that were the case? The same with the medical students...besides don't medical students leave their lab coats in the hospital or clinic for cleaning?
Don't know, don't know, kind of like the Clarence Thomas-Anita Hill thing.
Just can't see Ashcroft letting them go if there was any doubt at all.