Me, too!

We know little of you nor your the whole incident's backstory. I'd say this cat really is after Andre's pet monkey

You should have called the police and set up a trap for him when he dropped off the bag. He knows way too much information. I would only leave the house for short periods of time and when you do lock everything. Ask your neighbors to be on alert too in case they hear window breaking or something.

Its unfortunate that you live in England. If he does break into your house and you try to defend yourself you will go to jail.

Nope. I didn't really know much info at the time, at this point the only thing that seemed dodgy to me was him insisting on me to get the bag, I only knew about the security cam and him knowing my brother's company after I got the bag, when my brother told me.

Probably highlighted before, but with the address and the card details he can easily purchase stuff online and have them send to a phony address to pick up.

After all most of the time the sites only require the billing address and the card details. I think he's scamming rather than having a change of heart, especially if it happened in a blink of a moment. Your brother was foolish for giving that guy his house details and further stuff like the home telephone number.

I would probably change the bank accounts and alert the bank of possible fraudulent activity.

..Even if he gives back the contents of the bag intact he will likely try to break into the house too now, so a change of locks would be wise. There are very few good samartians in the world, especially those who steal first then have a change of heart later just because they didn't hit the jackpot with that steal.