Anyone have any interesting community Facebook investigations that had a satisfactory conclusion?

I’m asking this question because of something that’s happening in my local facebook area’s facebook community where a 17 year old lad has been knocked off his bike and robbed at knife point. One of those motorised ones (the bike probably shouldn’t be on the road but it’s the principle here) and the police haven’t done much. Long story short his mum has posted it on Friday and everyone’s been reporting when they spot it and any useful info etc., even chimed in myself after said bike cut me up in traffic on my way to the gym over the weekend.

The mum now has a name of the guy who stole it and has offered a reward for his number or address. I’m eagerly waiting for the end result as this twat doesn’t belong in society at all let alone my local area. Anyone have similar stories?