my son is in prison at Pendleton CIF. He was missed treated at RDC by guards does he have a good claim for a law suite?

He had told the guard that he had hairs in his food. And they told him to shut up so he set his tray back down and when he did one guard threw him down and then shovled him against the wall hitting his head twice. Then more guards jumped on him. There is a video and x-rays where they have it on file but don't know how long they keep it.