I don’t understand how it’s any of his employers business where he worked of an evening.
Unless it was bringing their company into disrepute, which would be the best outcome here.
The worst outcome would be if he worked in stocks and shares and was using privileged information to buy and sell the shares illegally (in which case he’s clearly an idiot and also likely to face court, perhaps even jail time).
I think he’s missing out a whole lot of info and telling you what he wants you to think. Or pretending the info he got wasn’t insider trading at all it was “from a pal”. Aye right mate. Wink wink.
And the reason he “doesn’t want another job” is because nobody will hire him again based on what he has done and the court case hanging over him.
Think carefully on how you want to proceed. Make sure your finances are sorted because if they say that he made say £75k on illegal trading, the police can take that money back as ‘proceeds of crime’. So they can come after your house if they said he paid the money into his mortgage you don’t have the £75k in cash to hand.
This could work out really badly for you. If he works in an industry to do with stocks and shares you need the truth right now. Sorry OP.
If he’s a builder or graphic designer or something non trading related ignore the majority of the above. But if he is.... 