The article says they were claimed to be found in his car by a then-girlfriend who took $10,000 reward money to testify, not that they were found by law enforcement and collected as evidence and checked against a list of things that were known to have been stolen. It’s plausible that nothing was found and the whole story was made up for cash, or that it was just some stuff he’d bought at a yard sale that was misidentified, or something he’d stolen from somewhere else. Someone saying someone had junk in their car isn’t strong evidence of anything.
If you’ve got a broken insulin pump, assuming you’re in a country with a functioning healthcare system, you should have been given a spare pump with the original, and probably some insulin pens, so when one breaks, you fall back to the spare, and get given a new one to be the new spare (or could get the broken one repaired). Using the spare is completely safe.
If you don’t have a spare, your sugars would go up over several hours, but you’d have a day or two to get to a hospital and potentially several days after that for someone to find you and get you to a hospital, so it’s not safe, but also not something you’d die from if you had any awareness that there was a problem.
If you’ve got an incorrectly-repaired pump, you could have it fail to give you enough insulin, and end up with higher sugars, notice the higher sugars, and then switch to the spare. That’d be inconvenient, but not a big deal. However, you could also have it dump its entire cartridge into you at once, and have your sugars plummet faster than you can eat. If you don’t have someone nearby, you could be dead in a couple of hours, or much less if you were, for example, driving. That’s much more dangerous than having no insulin at all.
Prosthetic legs don’t have a failure mode that kills you, so a bad repair can’t make them worse than not having them at all, but insulin pumps do, so a bad repair could.