74.50.97.246 is an open proxy, the likelihood that the user is actually in/from Tampa is nil.
Fyi:
I don’t know where this specific emailer is from.
I usually don’t post email addresses or ISP, but when it comes to threats, I do quote the text and add updates when they become available.
No doubt the guy is using a VPN, but that doesn’t mean there aren’t ways to find the person with means such as traffic analysis but they are more complicated.