MADISON, Wis. (AP) — A spokesman for the U.S. Drug Enforcement Administration says the agency is saddened by the death of an employee’s wife in an apparently random drive-by shooting on a Wisconsin interstate. DEA spokesman Leo Hawkins says Tracy Czaczkowski was a loving wife and mother to two young children. The Dane County Sheriff’s Office says investigators believe 20-year-old Zachary Hays shot Czaczkowski on Sunday as she and her family drove along an interstate on their way home to Illinois. The 44-year-old dental hygienist later died. Hays is also a suspect in a killing hours earlier in a Milwaukee suburb. Investigators say they believe the attack on the Czaczkowskis’ vehicle was random. They say they aren’t aware of any markings on the car that identified her husband as a DEA employee.