I'm so indecisive on this. I definitely don't think the criminal justice system, as it currently is, is working well. If it worked we obviously wouldn't have so many reoffenders.
I'm still very against having super harsh punishments though. It's so ridiculous when you see teens being charged as adults and spending the next 10-20 years in jail. Like I get that the victim is (perhaps) permanently affected, but I don't see ruining someone else's life as an effective way to stop this. Especially when the perpetrators are young and can be rehabilitated.
This is sort of unrelated to the justice system, but I think that there needs to be far more effort put in to prevent people offending in the first place, rather than just waiting for them to commit crimes.
In the case you mentioned The Special One, there was no way to prove that it wasn't an accident. The law says that a person must be guilty beyond reasonable doubt, and there most certainly was reasonable doubt. All I know about that case is from the article, but my initial impressions are if he intended to hurt lots of people why bring a handgun rather than a more powerful weapon, which would have been fairly easily obtained in the USA? If he intended to hurt her then why? If he intended to hurt anyone then why did the bullet ricochet off the ground?
If we accept that it was an accident, then I don't see any way you can justify imprisoning him. That would effectively be ending his life (although he wouldn't actually be dead) for an accident. Whilst the victims family may miss their daughter, the mans family will also be affected if he was imprisoned.
Assuming all my above assumptions about the case were true (ie. it was an accident), and it was me he killed, I would not want him imprisoned.
Having said that some crimes definitely deserve harsh punishment, but the crimes i think of when i say that are things like child abuse/exploitation/pornography, hit men, repeated offenders of severe crimes, etc.