Attack him before he alerts anyone else
From Create Your Own Story
You feel you have no choice but to take out the witness, you lung at him with your combat knife, trying to slash at him. Your first attempt misses and he dodges kicking you out of the door and onto the cold tarmac. You hit your head and start bleeding but you brush it off as you climb to your feet, the pilot has screamed for help and a group of men has assembled to take you down, when any of them approach you slash out at them.
Eventually due to the blood loss you fall unconscious and you are pounced on by four tough men. The doctors bandage your head and you kept in restraints. Luckily no one was injured but you've been charged with attempted murder and are being kicked from the army along with treason against the Monarch because you were trying to hide inside the plane.
THE END