David sounds like a bundle of fun,
If he was using my tools and my van van, then he would be sacked.
I had trouble with one of my lads claiming hours he had worked, and not doing certain jobs when he told me had. I phoned my HR guy and said draft me a sacking letter, because I was going to sack him straight away, later that day I had calmed down and told HR guy my new plans just to give the guy a talking to.
He told me that in all his years of giving people warnings, the very same people were 99 times out of 100 were sacked within a couple of months, and said I will tell you one thing, that a leopard never changes its spots.
Anyway I got my staff in and gave him a warning, during that warning I asked him was there anything else he wanted to tell me, he swore there was nothing else, he apologised profusely, so i sent him back off to work.
Lo and behold the very next day, we discovered even more naughty things which he had done, so needles to say I had to sack him, My HR gave me a told you so, when i told him.
We are still putting things right, even now, the guy could have caused my business a lot of harm had he carried on.
I learnt a big lesson that day, in that I should of acted a lot sooner and sacked him straight away, there were a few warning signs, but i was to trusting to see them. my reaction was always "there must of been a mistake" or "Oh John, not John he is a really nice guy"
How stupid was I ?
Like I said before, just sack him, you will regret it if you dont, if he has broken your trust once , he certainly will again