He’s a police dog. He is smart and knows the word and that it means something important.
Dogs are the absolute best!
A police dog is not supposed to react to a “drug” word like that. Only the actual smell of drugs. That could be wrongfully used to claim a “hit” on a car for further investigation without “true probable cause”.
I helped train police dogs for a couple years. And that is a huge No No right there. So is training them to specifically smell out and hit on just Cash with no drugs present, let alone “hit” on command in any way form or fashion.