I've already tried what you've suggested and because they are using a hotmail account it hasn't registered the IP in which it has been accessed and the emails sent from.
I can't believe you actually took the time to went through all my posts..ha ha.I think I have a fan.
advice you provide is in accurate and you get in a strop because it's inaccurate, so if anyone has an ego it's you!
Now I just wanted to help that's why asked about the details of case but all the details you provided are full of loopholes .This is just one example
As for finding details of the hotmail account, I used Google, typed in questions like....how long has email@example.com been active?