Justice for William

Hello, my name is David. My brother William was walking in Chinatown Los Angeles near the corner of Broadway and Alpine, when he was approached by a transient and attacked in broad daylight on the afternoon 3/9. The attacker pulled out a knife and began to stab my brother. As people called police, nobody helped to intervene. My brother was in the fight for his life. He was able to wrestle with him to the ground where he was repeatedly stabbed while fighting for his life. The police arrived and the assailant was arrested. William was stabbed over 10 times around his face, head and neck and along with lacerations to this groin and abdominal area. He remains in the hospital at this time. Please anything helps.