Culpable homicide refers to a negligent killing. If Pistorius is acquitted of murder, he could still be sent to jail for years if it's found he acted negligently in Steenkamp's death. Pistorius has admitted firing the four shots that killed Steenkamp on Valentine's Day last year.
Pistorius says he mistook his girlfriend, a model and budding reality TV star, for an intruder and killed her accidentally. The prosecution alleges the athlete intentionally killed her after a loud argument, which was heard by neighbors.
Masipa was explaining her reasoning behind the upcoming verdicts in the case against Pistorius, and said there were "just not enough facts" to support the finding of premeditated murder in Steenkamp's fatal shooting.
As the judge spoke, Pistorius wept quietly, his shoulders shaking as he sat on a wooden bench.