'Do you have a pulse?': Couple accidentally streamed heroin overdose on Facebook Live [GRAPHIC]

Warning: this story contains video you might find disturbing. BOSTON – A Facebook Live video from Dorchester shows a couple in a car shooting up and the life and death struggle that follows. Watch the video Posted on Wednesday just before 5:30 p.m. in Dorchester, a man walks up to confront a couple about using drugs…