Norm Stamper used to be police chief in Seattle when he unleashed police in full riot gear onto demonstrators at the 1999 World Trade Organization. He greatly regretted that action and now has become a critic of paramilitary gear for police and for using harsh tactics when dealing with the general public.
He appeared recently on The Colbert Report to talk about the events in Ferguson.
(This clip aired on September 2, 2014. To get suggestions on how to view clips of The Daily Show and The Colbert Report outside the US, please see this earlier post. If the videos autoplay, please see here for a diagnosis and possible solutions.)