From WDWNT (and other places)
A still of actual footage of the tour group: https://memegenerator.net/img/instances/55708345.jpg
As you can see, they were being quite subtle. It’s amazing they were caught. Course, it mighta been the singing that was the tip off.
Wow, that guy was either very brave or very stupid. Or both!
I was just about to post about this. In the article I read, the guy said his boss, Tony, gave it to him. Apparently the investigator is familiar with Tony.