Sigh. Did you even read my comments? I already addressed that. It does not matter whether the guy IDed himself by sending weird e-mails. You first have to trace those e-mails which may or may not (depending on whether the guy covered his tracks) give you an idea of where the guy is. Assuming that part was easy, you still have to find out where he is currently and apprehend him which takes a lot of cooperation with foreign law enforcement. Tons of people escape overseas and are never captured. I think this one time where they actually did get a suspect they were interested in that it's appropriate to give kudos where kudos are due and that's with the Thailand police.
tracing an email from the headers takes about 10 minutes. if he was using some registered account to send the emails, and he registered in his own name, or signed his name to the emails he sent - then they have his name and location.
where was he living in Thailand? Was he living under a fake name? was he hiding in the jungle?
in other words - if the guy wasn't trying to hide his name and location, then finding him isn't really that hard. that's my only point. Yes, the Thailand police cooperated - which is great.