William R. Zientek, 46, is charged with first-degree murder in the slaying Sunday of endocrinologist Olga Duchon in the 400 block of West Russell Street. Zientek is being held at Cook County Jail. Authorities say the pair were the parents of a 3-year-old child.

Barrington police have charged a 46-year-old man with first-degree murder in connection with the shooting death of a renowned doctor Sunday evening. Barrington resident William R. Zientek is accused

Olga Duchon, 42, of Vernon Hills, died after being shot in a Barrington townhome, hours after speaking at a medical association meeting.

According to officials, William R. Zientek, 46, of Barrington, has been charged with one felony count of first-degree murder in connection to the killing of 42-year-old Dr. Olga Duchon, an endocrinologist who lived in Vernon Hills.

The Barrington man suspected of killing north suburban endocrinologist Olga Duchon was ordered detained Wednesday after prosecutors alleged he lured her to his home and fatally shot her in front

The man accused of murdering his estranged girlfriend, Dr. Olga Duchon, in suburban Barrington appeared in court on Wednesday, and new details about the case have now come to light.

The suburban man accused of shooting and killing a prominent Lake County endocrinologist will make his first court appearance Wednesday, according to officials.