Anyone with the moxy to build/operate/own/sell/fly an airplane should have the brains to thoroughly examine any contractor retained for any flying-related function. WTF happened here - or perhaps did not happen.
While the owner/operator got screwed, whose fault is that? If nothing else, they should have restricted payment or paid under 50/50 terms.
Weaver is truly a thug, but the victim, contrail 39, is also not the sharpest pencil in the box. When all else fails, apply a little common sense.