Another racial slur heard on police radio channel

CHICAGO (WLS) -- Chicago police are investigating another case of someone tapping into their radio station and using a racial slur.

The slur was heard on the city's radio system Thursday. The city said the Office of Emergency Management and Communications is investigating as well. The FCC is already investigating two similar incidents from March 2016.

Police told the I-Team in March that when the talk button on a police radio is pressed, the device automatically sends a digital identifier that marks the number of the radio in police records. That function helps identify officers in trouble simply by keying in their radio. The transmissions from March were missing that digital identifier.