Having read the the whole thread, I am only echoing others with my advice: STOP TEXTING THE KID. All you're doing is giving him information as to your moves. If you want to completely destroy the kid, you need to be coming out of left field and completely broadsiding him with his parents crawling up his rear end all of a sudden. What's to say that the kid wasn't responding like it's no big deal, and then immediately contacting those people to tell them that a crazy stalker from the internet would be contacting them with some BS story about a theft that never happened"?
Worse, what if this guy Robert is in on it, and as big a bag of trash as his kid? That's always possible these days.
I would sincerely and highly recommend not texting or responding to that kid any further whatsoever. Either call this guy Robert, or have Law Enforcement handle it.
I already called the numbers this morning but n/a I will be xalling tomorrow, plus I will call USPS inspector. Also I'm not sure how someone can print down name different than he is signing. The knife was insured so I will have to ask the inspector tomorrow.