After beating him severely with an armrest , they shot Stethem and dumped his body on the ramp after landing .
They singled out U.S. Navy diver Robert D. Stethem .
After beating Robert D. Stethem severely with an armrest , they shot diver and dumped Robert D. Stethem 's body on the ramp after landing .
They singled out U.S. Navy diver Robert D. Stethem .