Boston (CNN) -- They could not say for certain who shot their loved ones in brutal gangland-style "hits," but a series of witnesses captivated the courtroom -- and drove two jurors to tears -- Thursday as prosecution testimony continued in the federal trial of reputed Boston mob leader James "Whitey" Bulger. One witnesses, 63-year-old Diane Sussman de Tennen, alternated between bouts of crying and attempts to smile as she recounted the night she was in a car that suddenly was riddled by bullets, leaving her then-boyfriend a quadriplegic for the remaining three decades of his life. "I remember hearing this noise -- a continuous stream of noise of gunfire, (like) rocks being thrown...it just was nonstop ... in retrospect it was a machine gun," she said, describing the night she and her boyfriend were riding home with another man, Michael Milano, after her birthday celebration at a Boston bar.
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Witnesses in the "Whitey" Bulger trial relive shootings that left relatives, friends dead
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Testimony was emotional, two jurors were in tears
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A witness remembers her boyfriend "covered in blood and broken glass, eyes glazed over"
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Reputed Boston mob leader Bulger is charged in 19 killings
Sussman de Tennen said she reached over @placeholder, who was collapsed on the steering wheel, and laid on the horn until a taxi driver pulled over and called an ambulance.