I was going to add the same, even with a spray foam on the backside, a metal / tin roof is going to resonate some noise. He belly crawled supposedly, but between the fact that this was the roof of the snipers nest, you would think that overhead surveillance from a drone or rotary winged craft would have picked this up. Now, there are stories with the cell phones that have been linked to his house, his work and DC, multiple times. The "Patsy" theory is proving out.
I was going to add the same, even with a spray foam on the backside, a metal / tin roof is going to resonate some noise. He belly crawled supposedly, but between the fact that this was the roof of the snipers nest, you would think that overhead surveillance from a drone or rotary winged craft would have picked this up. Now, there are stories with the cell phones that have been linked to his house, his work and DC, multiple times. The "Patsy" theory is proving out.