Crossbow slaying suspect is victim's sonOttawa man faces 1st-degree murder charge after death in libraryCBC News Zhou Fang appeared in a Toronto courtroom Friday. He's accused of killing his father, Si Cheng, with a crossbow. (Andrew Tavshunsky)

The man charged with killing 52-year-old Si Cheng by shooting him with a bolt from a crossbow inside a Toronto library is the victim's son, CBC News has learned.

Zhou Fang, 24, of Ottawa, was arrested shortly after the slaying Thursday and has been charged with first-degree murder in the death of his father, who lived in Toronto.

Police were called to the Toronto Public Library's Main Street branch near the corner of Main and Gerrard Street East in the city's east end just after 4 p.m.

Cheng was pronounced dead at the scene.

A police officer stands outside a library branch at Main Street near Gerrard Street East in Toronto on Friday morning. (Chris Young/Canadian Press)

Witnesses said that they saw a man approach Cheng, who was sitting on a bench in the library, and pepper-spray him. He was then shot, either in the face or the back, witnesses said.

Police officers saw a man run north on Main St. after the shooting. He jumped into a U-Haul rental truck and drove off. Police tracked the truck and arrested the driver.

Although the father-son relationship has been confirmed to CBC News, police have not released any information on a motive.

"It was not a random attack," said Toronto police spokesman Const. Tony Vella.

It's believed to be the first time a crossbow has been used in a homicide in Toronto.

Fang appeared in Ontario Court of Justice at College Park on Friday morning and was remanded in custody until Dec. 8.

Read more: http://www.cbc.ca/canada/toronto/story/2010/12/03/toornto-crossbow-homicide.html#ixzz175KFxI8z