FORT STEWART, Ga. AP – An Army sergeant, his face lit by the muzzle flash of his rifle, chased a superior officer at their base in Iraq until he fell, then stood over the man and fired two shots into him, a soldier in their unit testified Tuesday.

Staff Sgt. John Dresel was the first U.S. soldier to testify that he witnessed Sgt. Joseph Bozicevich shoot a fellow soldier during Bozicevich’s Article 32 hearing, which entered its second day Tuesday.