Protesters in New York gathered at separate demonstrations in Manhattan and Albany on Monday, 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.

Thirteen state department of corrections employees have been suspended without pay while one correction officer resigned after the deadly attack

Officials are investigating the death of Robert Brooks, an inmate who died after he was brutally pummeled by corrections officers in New York.

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.