Once again, for me the behaviour is suspicious not for the individual elements, but for the elements as a total. It's not normal behaviour to walk in the rain on a cold dark night wearing only a hoodie for protection, and looking at the houses you're going past. Again, as pointed out numerous times, yes there could be an innocent explaination, but for people that aren't mind readers and don't have the benefit of hindsight, when does the stranger in a hoodie out walking on a horrid night looking at the houses in the street where there had been previous recent burglaries go from being innocent to being a possible criminal?
If GZ had waves his hand and said, "Nah. it's probably innocent," and not rung the police and instead of TM it had been our friendly burglar Jimmy Jones, leading to someone being burgled, would that have been a good result for you?