Black crime: The Chicago Police Department has issued an alert in the 2nd District of Wentworth for several armed robberies that have occurred during January 2013

The offenders, described as six to seven African American females with a light completion between the ages of 16 and 20, enter cabs in the Loop. Upon arriving at their destinations on the South Side, one of the girls chokes the driver with a rope or cord, while another threatens the cab driver with a knife, demanding cash. Authorities say that the group then jumps out of the cab.