1
2
These two pictures are two of the most important for me -
I am not 100% sure on the bench, but this is the most likely - indicated by red arrow 1
These two cops picking something up was from that area behind this bench - red arrow 2.
Also indicated the route into the park, and the coverage for the windows at the back of the house,
What led them to this area? Did the dog indicate the bench? If I was the Police with a strong indication of entering the park along this path, then the natural suspicions would lead to the abandoned buildings, the pond, the river and the woods even without any physical evidence directing in that direction.
But I believe that something OTHER THAN screams/running man has led them to the park. I think the dog has indicated this bench.