All it takes is a memory dump of your PC and/or the hibernation file of the OS.
The Forensic Toolkit is about $300 – that’s nothing for sombody who wants to break security.
https://www.schneier.com/blog/archives/2012/12/breaking_hard-d.html (PGP, BitLocker and TrueCrypt)
I highly recommend subscribing to Bruce Schneier’s Crypto-Gram Newsletter for anything “Security” at <http://www.schneier.com/crypto-gram.html>