A friend who asked for instructions on how to use certain features of his wallet, was apparently tricked into divulging his seed to a stranger, and now his 2.6 btc are missing from the wallet, and so is the stranger. Does he have any recourse?
I'm afraid that his coins are gone forever. Even if you can track the dude who did it, once the coins are moved from one address to another, there's nothing you can do to get them back.
Lesson learned, you never give out your seed/private keys or any kind of information related to you bitcoin wallet to anyone.