https://youtu.be/lLimCcnee9c?si=FLnnRXxHtDzocrrD&t=922
The video is extremely rambling, but yep... it's extremely clear cut that the technician should be (at a minimum) fired and potentially charged by police.
The obvious next question would be... "so how many other people's tv's has this technician scratched?", followed by "are other employees doing this too? Is there a wider problem here...?"
Also, this technician should go to prison for vandalism and fraud. He should also have to reimburse the victim for the entire brand-new cost of the same TV, including s&h.