...or considering his trust list mainly contains the people who are trustworthy at the moment, can his account be locked with an unchanged trust list?
I expect it can, however do we really want this? While he should be remembered as being a good contributor to the forums in the past, he admitted to fraud. I can't say I'm very fond of the idea of a fraudster being automatically trusted by the system.
What I think would be the best way to go on from here would be for existing DT1 members to look through his trust list and determine which users should still be in DT, then adding them to their own trust lists to keep them there. After this, I think that it would be best if escrow.ms was removed from DT completely along with any other inactive/incapable members of DT1. Having dead weight in the default trust list may seem easier now, however it will not further down the line should anything else happen.
Well if he does get removed from DT 1, another CITM is happening.
What do you mean by this?