The family of a young man killed outside a popular Vancouver club is pleading for information about their son's murder.

Twenty-one-year-old Tyson Edwards died early Sunday morning after being stabbed outside Richards on Richards's nightclub. 

His mother says her son loved music, dogs, and being with relatives and friends - often choosing to spend his weekends with them rather than going out.

"He told me everything about his life, his fears, loves and dreams," says Carla Edwards.

"Tomorrow, I will live out a mother's worst nightmare. I will attend my only son's memorial services."

Police don't know what led up to the attack, but they believe there are people out there who do.

"I understand people are afraid or perhaps ambivalent to tell their story -- it's those people that are going to make a difference," says Vancouver Police's Detective Joe Danieli.

Investigators say though a lot of people were there, only a few witnesses have come forward. They say even friends of Tyson's who may have been with him have yet to speak.

"This family has been victimized once. Don't re-victimize them again by remaining silent, and allowing these cowards to go unpunished."

Susan Jessop knows how important it can be for people to come forward. Her son, Lee Matasi, was shot and killed on the same street back in 2005.

"I know it's a horrible thing to see, but your evidence could help put someone who deserves to be in jail," she told CTV News from Ottawa.

"We have to ask ourselves, who would we prefer to have on our streets, angels or killers?" says Edwards' father, Tyson Kilmer.

"My son was an angel, and he had his life taken from him, while those other people are still free."

Police are looking at surveillance video from the area, but Tyson's family wants those silent witnesses to understand their help is just as important.

"We loved him fiercely," says Edwards. "And we want you to know, we have your back."

Anyone with information about Edwards's death can call Vancouver homicide investigators directly at 604-717-2500, or Crime Stoppers at 1-800-222-8477.

With a report from CTV British Columbia's Maria Weisgarber