My 2 cents, this guy just is bad news...... he has had more than ample opportunity to make things right is "the situation" made him less reliable than normal. As 73Jazz knows, I am quite adept at cyber sleuthing and I have been able to find decent amount of info on this guy, including some people on other forums who had concerns over where their stuff was. He may at one point have been a solid and trustworthy guy, but most criminals don't intend to become a criminal.... it happens over time. If you take money for a service or a product you don't provide it equates to stealing, a criminal offence that can lead to prison sentences of 6 months or more.
73Jazz (OR ONE OF THE HELPERS IN THE NEIGHBORHOOD OF SEAN) go to the police. With the phone numbers you have and some more details I could provide, they could track his ass down I'm sure.
No violent acts, no bs, but also no "massaging" or extra "consideration" because somebody might have issues........ this Sean is 23 years old..... Old enough to commit a crime, thus certainly old enough to do time.