Practiced prison break
Sweat tells police that he and Matt conducted a practice run of their prison break the night before they disappeared. The night before they broke out, Sweat and Matt went through the tunnels and popped their heads up at a manhole, but decided it wasn’t isolated enough, so they decided to escape from a different manhole instead. DA:
To make a dry run and have the ability to escape, and then go back in, it is a little baffling.