Brianna Marshall, 12, was last seen on Monday leaving her home on the 6700 block of South Cregier Avenue, the Jackson Park Highlands neighborhood in Chicago, Illinois. She has been missing since June 18, 2012.
Brianna frequents the area of 41st Street and King Drive, police said.
Brianna was last seen wearing a black and white skirt, a white short sleeved blouse over a black tank top and black sandals. She was carrying a brown shoulder bag and was wearing her hair in a pinned-up style, police said.
Brianna has dark brown hair and brown eyes. She is 5 feet 1 inches tall and weighs 110 pounds.
Anyone with information on her whereabouts should contact the police at 312-747-8385.