Police have released a sketch of a man they believe witnessed the gang-style slaying of six men, including two innocent bystanders, in a Surrey, B.C., apartment building last October.

Police are looking for this man, who may have witnessed the gang-style slaying of six men in a Surrey apartment last October.
(Integrated Homicide Investigation Team)

RCMP Insp. Bill Fordy issued the sketch of an Asian man in his 20s, and is asking him to come forward as a witness.

Investigators believe the man saw a group of men come and go from the building in a black BMW model 745 LI.

It is believed the man police are seeking knew some of the dead men.

Police think the vehicle may be linked to the slayings of six men who were found inside a 15th-floor apartment.

Two of the dead men, Chris Mohan, 22, of Surrey, and Edward Schellenberg, 55, of Abbotsford, are believed to have been in the wrong place at the wrong time.

The other four were young men who police believe had links to gangs and drugs. They were Edward Narong, Corey and Michael Lal, and Ryan Bartolomeo.