NEW : Police identify shooting victim . -- Police exchanged fire with the gunmen for about 20 minutes . A man who was shot in the head and killed by a police officer has been identified as Michael Brown, 18, of Ferguson, Missouri. More than three dozen people were briefly taken hostage . Four police officers were injured .
NEW : Police identify shooting victim . -- A man who was shot in the head and killed by a police officer has been identified as Michael Brown, 18, of Ferguson, Missouri. More than three dozen people were briefly taken hostage . Four police officers were injured .