In another comment I posted a link to another study that shows police does not provide footage from most of police shootings. Yes, most of the time the camera is recording but most of the time only police can see the footage. That’s what they mean by "highly controllable evidence”. When it exonerates the officer they give to the TV stations in a matter of hours. When it doesn’t they hide it and you have to fight them in courts for years to see it.
In another comment I posted a link to another study that shows police does not provide footage from most of police shootings. Yes, most of the time the camera is recording but most of the time only police can see the footage. That’s what they mean by "highly controllable evidence”. When it exonerates the officer they give to the TV stations in a matter of hours. When it doesn’t they hide it and you have to fight them in courts for years to see it.