They may not have been in NK. It is possible that they were in China near the NK border.
The first reports came out that the two reporters figured they can sneak over the border for a better camera shot because they could not see any North Korean guards anywhere. Their camera man made it back to the Chinese side and is currently in San Francisco. He is told to keep his mouth shut and is kept away from the public. His employer did not want to jeopardize the women on trial if the camera man said something wrong like yea we snuck over to get a better camera shot. These two women reporters got to be dumb as crap to even pull a stunt like that. Maybe in the US one can trespass to get a story, but this is North Korea they are dealing with.