Gee - no escape hatches/latches. However, if someone had not locked them in from the outside, they could have just pushed the door open.
And this is the key, and the guy to sue. Nevermind that he does not have any money. This suit against the trailer manufacturer is similar to the suit agains gun manufacturers with the exception out there that refrigerator manufacturers have moved away from latches that lock and cannot be opened to the magnetic latch that can be pushed open. These trucks can be pushed open unless latched and locked from outside. I would say if the truck was going to be used to haul human cargo then a fire axe should be left inside. What? The fire axe was not there?