Complex sentence: During his indecision, he witnessed Qui-Gon killing his father after Crion turned to the dark side, discovering his father's corruption and punishment for his transgressions, and accepting this also may have been the true trial he had been meant to face.
Split into simpler sentences: During his indecision, he witnessed Qui-Gon killing his father after Crion turned to the dark side. Discovering his father's corruption and punishment for his transgressions, and accepting this also may have been the true trial he had been meant to face.