The problem is in how these tools are sold to them. Not everybody can be an expert in every topic. Like in every other application area, these AI systems are promoted as being able to do about a thousand times more, and a million times more reliably, than they actually are. Of course the departments can be expected to do some due diligence and instruct their officers, but the lies by AI system suppliers is where a large part of the blame belongs. Manufacturers of cameras or CCTV systems never told the police department that the system would do their job for them.