Sketch released in sexual assault

March 13, 2013 8:15:18 PM PDT
Chicago police have released a sketch of the man wanted for a sexual assault.

According to investigators, he was armed with a knife when he approached an 18-year-old woman as she walked in the 2400 block of West 65th Street.

Police say the man forced her into an alley, then sexually assaulted her.

Anyone with information is asked to call police.