He appears to be in Holt County.
Several options.
Contact the County Prosecutor or Sheriif and see if they will get involved. Sometimes when a badge shows up at your doorstep to “investigate” that can sometimes shake things loose.
Contact your local USPO Postal Insoector and see if he can get involved. If you used the USPS to send anything to him they likely will get involved.
If you used a credit card that involves fraud by wire, contact your local FBI office and see if they will get involved.
Wire fraud and mail fraud are federal felonies, correct? Either one should have enough jail time attached to get his attention.
Kevin
