A Toronto court has released chilling audio of a 911 call heard during the trial of Const. James Forcillo, as jurors deliberated for a second day.

Bridgette McGregor called 911 when 18-year-old Sammy Yatim approached her with a knife inside a Toronto streetcar in June 2013.

She told the operator “he just pulled a knife on me, he attacked me," then began crying uncontrollably.

Soon after Forcillo arrived at the scene, he fatally shot Yatim.

Forcillo has pleaded not guilty to second-degree murder.

The jury must decide if Forcillo shot Yatim in self-defence, or ignored viable use-of-force options.

With files from The Canadian Press