This is a pretty good video by TAPS and SyFy Ghost Hunters. Very hard to debunk that is for sure. I wondered what the “?” sign is on the thermal, come to find out it is a #2 on the locker. They couldn’t explain why it was glowing red/yellow/etc. The apparition posing for them in the thermal was investigated and they could not come up with any solution other than… it was a ghost.