Helpful strangers
> a man came up to me and told me he hadn't seen the robbery – but had seen the guy who did it, and reckoned he would be able to recognize him (I had only seen the back of him). [...]He gave me his driving license, I took a pic,
That wasn't a great idea: you took a pic that sync'd with your iCloud account which the perp could then see in Photos on the Mac? Better hope your screen lock kicked in quickly.