@abc7chicago: New details were unveiled in what each side says happened Sunday night that ultimately resulted in the shooting death of Dr. Olga Duchon in Barrington and the arrest of William Zientek. The State's Attorney presented evidence collected by Barrington Police suggesting that Dr. Duchon was struck in the back of the head with a baseball bat twice and was then shot in the stomach. The attorney representing the man facing the murder charge said it's Zientek's assertion that this all unfolded in self-defense and that Dr. Duchon pointed the weapon at him. Attorneys said there was a struggle over the weapon that resulted in the gun discharging, and fatally injuring Duchon.