A security guard where I work has finally finished committing PD. Important B/G- he's been working there a lot longer than I have, and was very senior, although not a supervisor.
He had always been one of those people who loves to talk. In fact, it's hard to get away from him when he starts talking, and on occasion, he'd follow you down the hall, talking. That was overlooked for years.
He loves to be In Charge. He knows Everything About Everything, especially about how our facility security is run. In the last two years, he began committing PD by suddenly deciding that our security procedures needed to be changed, and changing them. Without coordinating with a) his supervisor, or b) the people who actually, you know, write the security plans. Then he'd train everyone junior to him or new to the company on the procedures that existed only in his mind.
In the last year, his need to be In Charge really got stronger. He started staying late after his shift, and doing security-type stuff without authorization. For example, at one point he interfered with a drill by directing the Fire Department to go someplace that they weren't expected to be. He was off-duty at the time, so he didn't have a radio, and since the security guard who was on duty couldn't leave her post, she couldn't stop him. He got written up for that.
Then he started showing up before his shift to do security-type stuff. Now, the things he was doing were all valid tasks, but he was doing them wrong, and they weren't his responsibility because he wasn't on duty. His final act of PD came when the head of security discovered him coming in half an hour before the evening shift, and walking the rounds of the buildings before his shift started. He had no radio and no keys (the on-duty officer had them), so he would *prop the doors open*. This kind of negates the point of, you know, security. He was banned from our facility, and because that's a fireable offense at his company, he was fired.