AndrewR you have put your finger on the point that was eluding me for years. Something didn’t feel right about ramp checks but I couldn’t work out what it was. The inquiry about past activity is definitely an investigation, potentially leading to criminal charges and a felony conviction, therefore you have a right to remain silent and perhaps more importantly, the courts are not allowed to make any inference of guilt from your silence.
Furthermore, comparisons of CASA operations with Police methods and investigations don’t pass the smell test. The Police are governed by stringent standards of behavior backed up by a fearful internal investigatory watchdog that scrutinizes everything they do. Not so CASA.