what should I do if I know that an employee is using illegal drugs right before she comes to work?
Nothing
nothing, mind your own business. only say something if it becomes a safety issue. other than that, leave 'em be.
report it so it can be handled appropriately. they can test her. she can get help and there won't be a safety issue.
Do you wanna blackmail her? Get some more money off to the side?
How about NO?!?
Mother Earth needs to douche.
I used to smoke weed on the clock WHO CARES?!?!