I have an extremely unique situation in which I need to discipline one of my subordinates for violating my privacy. My subordinate went through my desk without my permission while I was running a very quick errand.
A little background. We are on a team making a very important product for our company (I won’t say the name here but you would definitely know it if you heard it). Unfortunately there have been a lot of missed deadlines due to inexperience and laziness on the part of our programmers. One of the key issues I was able to identify was that many programmers like to leave as soon as they think they can get away with it or if they want to take long lunches. To fix this problem I made a policy of collecting car keys during our morning one-on-one stand ups, that way I knew when programmers were leaving the office too early.
One of the more arrogant coders who has always given me problems over my policies went through my desk to get his car keys while I was running an errand at lunch. This is not my first issue with this employee and I have given him many verbal warnings in the past.
I feel like my privacy has been violated but I would prefer not to go to HR or our manager over the issue.
How can I discipline this rebellious employee?