The Wikipedia article on the real crime includes
"On 4 January 1989, using one of the boys' loss at mah-jongg as a pretext, the four beat her with an iron barbell, poured lighter fluid on her legs, arms, face and stomach, and set her on fire. She died later that day of shock. The four boys claimed that they were not aware of how badly injured she was, or that they believed she had been malingering."
It's sickening that the longest sentence any of them got was 8 years. It's too bad the case couldn't've been tried in Texas.