California State University Northridge: CSUN Prof Weighs the Power of Social Media to Empower Communities of Color. “Video of the murder of George Floyd in May 2020, taken by witnesses, sparked outrage on social media, fueled by the fact that this was not the only online video of an officer taking the life of a Black American. According to California State University, Northridge criminology and justice studies professor Brianne Posey, young activists using video of encounters between police officers and civilians of color are both helping and not helping shift the power dynamic between the two groups.”