Don't you think it's more likely that the police involved - who all knew about and experienced wearing the body cams for a portion of their shifts - modified th

Don't you think it's more likely that the police involved - who all knew about and experienced wearing the body cams for a portion of their shifts - modified their overall behaviour, than assume that the unrelated public - who very likely don't know that police are trialling the cameras, were told when they were being recorded, and who probably haven't individually had multiple interactions with police before/during the trial (ie. to learn and modify their behaviour, even when they knew they were not being filmed by body cameras) - all managed to modify their behaviour, without conferring or conspiring, in line with the trial time?