Gao Yang, Jansen, and Tarta were the last to leave because all three of them were questioned.
However, before leaving, Gao Yang had carefully buried the remaining bullets and shells, so when he left, he didn't attract much attention. As for Jansen and Tarta, they didn't carry anything unusual from the start.
To be honest, not many people would suspect that the reenactors of war were the ones who fired the shot that killed a target on a distant grandstand, as the difficulty was too high.
Add to that, there was always a gendarme in the fortress who could testify that under his supervision, those pretending to be German soldiers didn't make any unusual moves.
Although Gao Yang did leave briefly, dropped to one knee, and fired a shot, no one would think he aimed at the grandstand and accurately killed the intended target.
