Thank you for the photos.
They have further clarified in my mind that an irrational person would be very unlikely to access the top of the tank by climbing up the ladder.
Look at the jumble of pipes that they would have to navigate.
In the dark! Or at least, in the semi-dark with the rooftop lighting.
In fact, it would have had to be a very very determined killer to put the body in the tank.
Imagine carrying a 100 lb body up to the roof, then climbing up and balancing on the pipes to get to the wooden ladder, which as you say is not attached and somewhat loose.
I don't think one person, alone, would even attempt to move the body up to the top of the tank.
They have further clarified in my mind that an irrational person would be very unlikely to access the top of the tank by climbing up the ladder.
Look at the jumble of pipes that they would have to navigate.
In the dark! Or at least, in the semi-dark with the rooftop lighting.
In fact, it would have had to be a very very determined killer to put the body in the tank.
Imagine carrying a 100 lb body up to the roof, then climbing up and balancing on the pipes to get to the wooden ladder, which as you say is not attached and somewhat loose.
I don't think one person, alone, would even attempt to move the body up to the top of the tank.