Glad you got it back, i had a similar incident with a guy called Shiken, detail is somewhere in the "Peacock theft" thread.
Although my story didnt have a fair ending, GM basically said he pulled a fast one.... and in doing so inadvertantly revealed a way (that i wont share) you could basically scam anything without any possibility of GM intervention. made me Fing angry, especially since i could provide screenshots of the logs. /sigh.
I have people i would consider friends i would trust, and those who i wouldnt, everyone makes bad calls on trust at times, but its sad asshats still try and pull these scams.