I wouldn't put it past a shop to have cut the wire. There are some shady shops out there, always have been, always will be.
Back in college, I needed 4 tires for inspection. But with what I made, and college expenses, I couldn't afford 4 new tires. I found a shop that sold used tires, and I could afford the price. I went and looked at all 4 tires before they were mounted. All were worn about 50%, but otherwise fine. No damage. I had them mounted and balanced and I was on my way. On the subsequent drive home, I noticed there was a balance issue. This wouldn't prevent getting the inspection finished, so I went to the shop that did the original inspection and they looked at the 4 tires and measured the tread depth for the inspection report and I passed the inspection. They didn't even move the car, just measured the tread in the parking lot. When I had the chance to be near the shop that sold me the tires, I returned and they rebalanced the tires (no charge) and they seemed fine after that.
Months later, I develop a leak on one of the tires. When the tire was pulled, the shop said my repair was failing because I used multiple plugs in a hole that was too big to have been fixed with a plug. WHAT?!? These tires had no plugs when I inspected them and nobody else had access to the tires off the car except the shop that sold me the tires. The only explanation was that the shop that sold me the tires swapped one for the bad tire when I returned for rebalancing. I never would have bought the tires had I known they were going to install one with a plug in it. But due to the time to failure, I had no way to definitely prove the shop switched tires on me.