in the following clip, the team hears a response in real time after rob is talking in the jail cafeteria.
This is the same clip, but amplified once the voice responds.
this clip occurs in the east cell block while the team was walking around. you will hear a whoop whoop whoop noise hear in real time from the team. no one made the noise.
joliet prison september 2020
this is a shortened version of the whoop whoop whoop clip.