Charges announced in fatal stabbing Sunday of woman working at Wicker Park Walgreens

Charges have been filed against an 18-year-old Chicago man in the weekend slaying of an employee at a Walgreens in the Wicker Park neighborhood, police announced Tuesday.

Sincere Williams, 18, of the 1400 block of north Sedgwick Street, was charged with one count of first-degree murder, police said, and is expected to appear in court Wednesday.

Williams is accused in the fatal stabbing of Olga Calderone, 32, who was working in the Walgreens at 1372 N. Milwaukee on Sunday morning.

Police have said Calderone was working just after 9:30 a.m. when she was confronted by a knife-wielding attacker and killed in the store. Her assailant fled the scene.