Jasmine Crescent stairwell killer pleads guilty to manslaughter

Connor Stevenson, just 18 and unarmed, was knifed to death in the stairwell of his Jasmine Crescent apartment building over 14 lousy grams of weed.
It was April 14, 2015 — a Tuesday afternoon — and he had been stabbed in the heart and left to die alone after a drug robbery gone wrong. 
His so-called friend, David Dubois, was the one behind the deadly robbery.
And on Wednesday afternoon, Dubois, 21, finally stood up in court and took responsibility.
In a deal that spares him pros