While I think he got the sentence he deserved why is it the guy that actually raped the woman (the article specified the other guy not him) only got 17 years (plus 4 months)? Sounds to me like they both should have gotten life without parole (plus 4 months) then locked in the same cell together. Maybe then the other guy would have wound up dead.
Son/Random Task probably had to be tried, the other guy plead guilty in exchange for leniency. It’s the way the system works.