Yesterday, the father of the Columbia graduate student who died after running into traffic--while trying to flee a teen attacker--testified in Family Court yesterday.

A 14-year-old boy, Sheldon J., admitted to punching 24-year-old Minghui Yu on a traffic median near the Columbia campus; Yu ran into busy Broadway traffic and was fatally hit by a car. The Post reports that testimony from Yu's father, who traveled from China with his wife, moved the defendant and his mother to tears:

"It is the tradition of the Chinese people for their children to support their parents when they grow old," a crying Zhaofu Yu told Manhattan Family Court Judge Jane Pearl. "The only thing we will have is deepest sorrow surrounded by bittersweet memories. We have to face every day with the unspeakable grief of the total loss of joy in our lives."

..."We are both in our 50s and Minghui Yu was our only child. All of his grandparents are in their 80s. For the sake of their health, they have not been told of the death of their grandchild," Yu said.

The father, unable to choke back his tears, said, "Even now, we can't believe what happened. Minghui Yu was our light, our future, our hope, our support. This has swept away our happiness...Our mutual suffering and anguish is indescribable...If it was not for the support of from our friends, family and those close to us...our lives would collapse."

Yu added, "We thought public safety around the campus was good enough so we'd never have to worry about him."

Sheldon J., who was charged with second-degree manslaughter, has pleaded guilty.