From reading a few of the results, it seems like a pretty complex criminal history and hard to place blame on any one person.
Originally he was serving a ridiculous 95 year sentence for crimes committed as a 17 and 18 year old including robberies, burglaries, thefts and possessing a gun on school property. Serious crimes, but no mention of violence/injury to others--so a very, very harsh sentence for a juvenile. Those type of sentences should really be reserved for murderers.
So I can't really fault Huckabee for commuting his sentence after 11 years and after the parole board said he was safe to release.
But after that there seems like there was a series of screw ups that led to him not getting locked up long-term for parole violations etc. Along with another series of crimes (including a potential child sex offense--doesn't sound like intercourse, just making relatives get naked for 5 minutes on Sundays or some weird shit) in Washington that didn't end up with him behind bars--guess no clear evidence of crimes.
It seems like the real fault here is this guy seems to have clear mental issues, but some how through his run ins with the law, problems with his family etc. it doesn't seem like he got the diagnosis and treatment he needed to prevent these weird behaviors and this tragic crime from happening.
All I can say is that it's always tragic when someone with issues falls through the cracks and commits more serious crimes. But at the same time, it's careful not to go all gung ho about it and want to throw everyone behind bars for as long as possible and throw away the key as only a minority of criminals are "career criminals" that will pretty much always be involved in crime if not locked up.
That non-sense approach through the 80s and 90s has left us with the

ed up criminal justice system we have today with all the problems that come with mass incarceration (prison crowding, impact on inner city communities that perpetuates cumulative disadvantage and increases crime in future generations etc.) combined with inmates getting less rehabilitation programming (despite us knowing more about what's effective than in the past) and being more likely to re-offend when their terms are up etc. Hell, that probably has a lot to do with why his problems were apparently not diagnosed and able to be dealt with (and factored into his release decision) in the first place.