Eventually he couldn't take it anymore and surrendered himself. He was then given a suspended sentence citing that he already has been through enough.
Here's a podcast episode on that: https://snapjudgment.org/cop-out
https://en.wikipedia.org/wiki/Robert_William_Fisher
Yep - he's still on the wanted list - going on 18-19 years now. It's unclear whether he's dead, hiding out, or what; all signs point to him at least escaping and "going into the wilderness". What's happened since that point is anyone's guess.
For that matter, though, the whole escapade has a lot of questions if you research it. The official story is that one day, he snapped, and decided to kill his wife and kids, then blow up their house (natural gas explosion - leveled it) - supposedly to try to hid the evidence of the murder. Then he took the dog with him in their SUV, ran off into the wilderness - then vanished. The dog and the SUV were found, and that was it.
There were questions (at the time) - theory, conspiracy, you name it - but I don't know what to make of them; it was all one weird thing in what would turn out to be a tumultuous year, and quickly overtaken by events and somewhat "forgotten".
The questions still remain as to why and what really happened - the official case states marital trouble, but none of it seems (but who knows what his mental state was) to rise to the level of what occurred, though the background seems a convenient explanation after the fact.
A criminal justice system centered around reform results in a safer and more humane society for everyone.
I wonder whether this is typical, or he was given special treatment.