Texas police officer filmed violently arresting teenage girl and pulling his gun on bystanders

Someone placed a disturbance call which started when youths showed up to a community pool party taking place McKinney, Texas.  Once police arrived, one of the officers, David Eric Casebolt, tried to subdue a teenage girl by attempting to put her face on the ground.  As the other teenagers start fleeing, he is observed waving his handgun at them.  This video shows overuse of force possibly fueled by racism.  The officer has been placed on administrative leave with many calling for his termination and he subsequently resigned.