I don't think he will be able to help you on that since it's only admins who are able to view PMs as far as I know.

Admins and global moderators can do it.

No, I don't think so. Global mods cannot see PM's unless you use the report to mod function.

As the OP will not be able to prove the account was hacked and I find the story hard to believe since it is regarding the "hacker1001101001" account:
https://bitcointalk.org/index.php?action=profile;u=1021758

I agree. Sounds like a made up story. The account has multiple negatives and was abandoned for years. So, why the sudden interest?