If it is from the hack and someone is trying to launder the coins they could:
Give away first 1000 coins.
Observe fallout - police interest in recipient, recipients ability to sell coins etc.
If fallout is negligible then do the same again saying it will be a weekly thing but this time send to an address of their own that they have posted in amongst the ever increasing number of addresses.
Repeat in subsequent weeks.
I haven't posted an address by the way - seems wrong as it's other people's bitcoin that should be returned.
+1 gj. Don't post it. Don't be a bitch.