WINNIPEG -- A trial starting in a Winnipeg courtroom could determine if dealers can be held responsible for the death of someone using their drugs.

Curtis Haas, who is 51, has pleaded not guilty to manslaughter in the death of 20-year-old Wendy Henry.

Henry died in 2007 when she overdosed on morphine she was allegedly provided by Haas.

Haas is also charged with drug trafficking and criminal negligence causing death.

The Crown has indicated it will rely on expert witnesses and statements given to police by the accused.

Police have said a conviction could open the door for similar charges in the future.