Someone who makes a lot of mistakes or accidents on the job usually doesn't keep their job too long, so a senior officer without a history of making mistakes or doing things on accident wouldn't shoot somebody on accident either.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.