Body camera footage documenting the fatal beating of Robert Brooks at the hands of New York state correctional officers has triggered an outpouring of rage and condemnations – and analysis from experts who said the video shows a misuse of force by officers.

Protesters in New York gathered Monday at separate demonstrations in Manhattan and Albany, holding up signs reading “Black Lives Matter” and “Justice for Robert Brooks” days after a disturbing video of the Black inmate’s fatal beating at the hands of correctional officers was released.