They have explanations for those things. I don't know of any reason why an intruder couldn't just walk out the door near that grate. The crazy part is the second floor hemp rope business. Iirc, Lou Smit said the intruder brought it in to facilitate his escape. To rappel from the 2nd floor? The Ramseys both said the rope might belong to JAR so it doesn't actually need an explanation. And it's a dead ringer for a rope JonBenet used in a photoshoot years earlier. When confronted with photographic evidence, Smit doubled down and said the rope in evidence didn't hold its shape as well as the one in the photoshoot. So the intruder, according to Smit, brought in a rope of the same material, handedness, length and with the ends taped exactly the same way, just a little limper. That should have narrowed down the viable suspects, huh? One might expect the natural fibers of a rope to degrade a bit over the years. It seems that Smit could not admit a mistake.