I was talking with my wife the other night about these arrests. She mentioned how hard it must be for the police officers to have to watch this type of thing. Necessary, because of their job and the investigation, but it must be extremely hard on the person doing the investigation.
Yes it is. Burn-out is a real occupational hazard for coppers and child protection officers.
Humans tend to norm to those around them. It's our greatest strength and weakness.