TWO THINGS:
1: INSIDE JOB
OR
2: HACKED
Or a combination of both.
True.
Either way.. Sucks for them. Lucky for the guy that nabbed it. Next time bump the security. Hell especially for MILLIONS $$$!!!!!! I would kill someone. I already lost 12 with MOOLAHPALSCAM. I wouldn't sleep with 18K gone.
Hopefully they can recover from a 19,000 BTC loss if they were not fragile before.