Answer:
The man uses the cameras as a practical tool to call the attention of television viewers nationwide, so people will realize how white officers mistreat Black Americans in their fight against white oppressors, thereby, preventing the policemen from using physical force.
Step-by-step explanation:
This is an old technique implemented by Dr. Martin Luther King back in the 60's, when he fought for civil rights. Through this he would use the mass media to show Americans, that Civil Rights Movements is not a violent movement.