CHICAGO (CBS)– Two people were arrested after a chain of related crashes on the Dan Ryan this past weekend, which left one person dead.

Illinois State Police said a 34-year-old man was driving under the influence, early Sunday morning, when he lost control of his car where the express and local lanes split.

READ MORE: Chicago Sky Win First WNBA Championship As They Top Phoenix Mercury

His car hit a median and flipped.

A woman and three children inside the car with him were hurt, but are expected to recover.

READ MORE: Jubilant And Inspired Fans, Booming Businesses Near Wintrust Arena As Chicago Sky Win WNBA Championship

Three good Samaritans stopped to help.

ISP says that’s when a 45-year-old woman, also driving under the influence, struck-and-killed one of them as she passed.

MORE NEWS: Chicago Weather: Slow Warm-Up Beginning

Both drivers have been charged.