The terrifying part to me is that cops across the nation have a long history of seeing that the tech they want to use is unreliable and based on junky science, but they still push it through anyway. Aren’t police dogs about as reliable as a coin-flip when their handlers aren’t nipping at their neck to get them to jump at anything? They don’t care if it’s right as long as they can use it to justify their behavior, so they make it policy.