Im sure sometimes, while others he is the one reporting what he is seeing etc.
Certainly sometimes he would report what he was seeing. But you cited "numerous" calls to support the notion he was patrolling. Regardless, he was undoubtedly keeping an eye out while walking his dog so debating whether he even patrolled seems like a moot point to me. All I'm saying is that keeping an eye out while walking your dog doesn't support anybody's wanna-be cop contention.