Well done the person who asked the question and forced the check. What could have happened to a live baby doesn't bear thinking about - tiny, sufffocating coffin (no air holes - not needed) and probably a cold hold too.
Several years ago we had a baby, weighing approximately 1kg, admitted to our Neonatal Intensive Care Unit. The baby had been discovered in hand luggage at the local international airport at the end of a flight from Pakistan. The baby hadn't been born on the flight, but was about two weeks old. This baby was seriously small for dates which is how it managed to survive. We were fairly sure that it had been well sedated before and probably also during, the long flight. It was cold and hungry on arrival but once warmed up and given some food, did well and eventually went home after in depth investigations by both Police and Social Services.