Knife-wielding suspect in Surrey, B.C., road rage incident captured on camera | Hanomansing Tonight

Widely circulated video shows a 37-year-old man chasing a victim with a knife during an altercation at a Surrey, B.C., park. Local photographer Robin Nuber, who filmed the incident and helped the victim to safety, says it was 'harrowing.' »»» Subscribe to CBC News to watch more