Nathan Vass has been a metro driver for 18 years. He's also a writer and filmmaker. He counted Shawn Yim among his friends. He told KUOW’s Rob Wood about Yim’s life and loss, and the role bus drivers play in our city.

A metro bus driver was stabbed and killed near Seattle's University of Washington campus early Wednesday morning, police have confirmed. Police there was a physical altercation that eventually led to a stabbing just before 3 a.