Yes, the US should get to the bottom of what happened there ASAP, and if it happened, then those who did it should receive training on what is and is not permitted in interrogations and why. If they broke the rules they should be reprimanded or worse and transferred. If they didn't break the rules, then the rules should be changed.

They won't get to the bottom of it, the cover-up is in full swing.

To have this much going on and enough people relaxed enough to take pictures, means that the activity was widespread. Given that it was widespread, and that it took pictures to get an investigation opened up, means it was done with superior's knowledge.

but..the situations are a bit different.

This is a controlled environment. No one gets on-or-off without permission and the responsibility of the actions of the employees are held by higher-ups.

Happy slapping? No control/responsibility for actions and not a controlled environment. And in this case, Police were already investigating....they had taken actions to try and stop the problem.

83 year old? Again, no one was in control/responsibility for the actions of the individual in question (except the individual themself). And in that case, it's doubtful even the individual knew that they were being photographed.

The problem isn't that the actions were photographed. The problem is that I have to believe that their higher-ups were shown/knew about the photographs. (The is the outside chance that they didn't know about photographs being taken at the base - but given that it's a controlled environment, that indicates a far worse problem, imo).