OP is also posted in
Bitcoin Technical Support and he/she is obviously forgot on this thread.
Thanks for the help everyone. At this point, all indications point towards an insider job. We have traced the chain of custody and it is unrelated to any technical issue with Trezor.
So it is clear that there is no problem with Trezor, insider job probably means that some of victim family/friends took advantage of the opportunity and wipe out his hardware wallet. Since it is over 35
BTC stolen this is classic case for police, the thief probably left some traces. What we can learn from this that even coins are on hardware wallet and seed written down on paper does not mean we are safe.