cell phone footage captured the moment brandon wyne , 17 , and his friend courtney griffith , 18 , on january 10 when they were pulled over for a broken tail light .
the footage has prompted an investigation into the officers ' conduct - and claims he even tried to delete the video , but failed .
brandon wyne was in the backseat of the car driven by his friend courtney griffith , 18 , on january 10 .