Who knows if the guys name is really Tom Williams. The person registered Mybitcoin.com through http://www.privacyshark.com/about.html

Could be anyone. Privacy Shark hides everything. The address on WHOIS for mybitcoin.com is from Privacy Shark and not "Tom Williams". Really no way to track down the real owner of MyBitcoin.com uness Privacy Shark has an email address for the person.