Police shoot, kill 18-year-old on South Side

July 19, 2011 (CHICAGO)

Authorities say officers were trying to arrest Parise Mercer Jr. when, according to police, he took off running and then pointed a gun at officers in the 9200-block of South Justine.

Police opened fire and killed the teen. No officers were hurt.

This is the sixth Chicago police-involved shooting in the past 72 hours.

Mercer was suspected of shooting two people earlier. Their injuries were not life-threatening.

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