[KennyBlanken]

Portrayal of police dogs in a positive light is necessary because otherwise people would see them for what they are: living probable-cause generators and loopholes on laws and regulations on police brutality.

There's plenty of evidence police dogs are worse than a coin flip and react to their handlers - but the supreme court said that was irrelevant and upheld basing a search off a dog's reaction to be valid. Dogs also act as a proxy for brutal, violent treatment of someone.