More proof the compression tool was made of soft metal and therefore the defendant is not just a careless idiot who overtightens things. If it please the Court, I present the following photograph as Exhibit 1:
Note the 6mm wide, 1mm deep channel in the shaft near the threads. The nut was full of metal bits from the damaged threads and therefore difficult to turn, so the defendant used a pair of small vice grips to hold the shaft. Apparently, the vice grips weren't cinched down enough, so they carved the channel during a single rotation of the shaft. A channel of this depth could not be created so quickly unless the metal was soft.
And so, ladies and gentlemen of the jury, I submit to you that this entire fiasco resulted from too-soft metal and therefore LoneWolfGal is innocent of boneheaded workmanship.
The defense rests.