I have recently discovered something about your world: Some people think your world’s police dogs are very intelligent.
How do I know this, you ask? Well, good question! I mention this because one judge in your world had a dog write a witness report.
Granted, the police officers needed to fill out the report for the dog, but that is moderately irrelevant. Your judges must think very highly of police dogs, and that is what truly matters.
So, your police dogs must be very smart.