More details are coming out about the man who defected by swimming in a wet suit and then working his way across the DMZ after landing on the beach:
A North Korean man was caught on military surveillance cameras along the east coast 10 times after he swam ashore in the South last week, but soldiers failed to notice eight of them even after alarm bells rang, the Joint Chiefs of Staff (JCS) said Tuesday.
The announcement was a key point of the results of the JCS’ weeklong probe into the Feb. 16 incident. The North Korean man was ultimately captured more than six hours later inside a restricted area north of the Civilian Control Line in the eastern border town of Goseong.
Yonhap
You can read much more at the link, but the man defected overnight which leads me to believe the ROK Army soldiers manning the cameras were probably sleeping on duty. The man wasn’t detected by the guards manning the camera until the next morning.