This is a complicated issue, I have friends and associates who work inside the prison sector and criminal psychiatric system. Its not all that cut and dry.
You can be found guilty,sent to prison then have it overturned later through appeal.
So there is nothing to say he didn't serve time.
I also know people like This man.

I a voided commenting before because I found the bigotry and duality all most more than I could stomach.
The OP made the right choice for herself, because she isn't in a position to deal with what This could entail, or what it would require from her to be the partner of someone with this type of mental illness.

And that is what I am focusing on here, not his crime, because we only know what's been said and that is he has schizophrenia.

For those of you unfamiliar with this Condition, you do not get split personality. You suffer delusions, psychosis and delusions that can so powerful they destroy your very reality.
You can be convinced that people and places you have known your whole life are not safe and they mean you harm.
Now no-one here knows what happened, but I am not comfortable judging someones personality and intentions based on so little.
No one here would argue the OP made the right choice for herself.
I had hoped that on a forum concerned with mental illness people might have stopped to consider what it would mean to be pushed so far you couldn't come back from the edge.

I wonder if a woman had killed her children in the middle of a post partum psychosis would ppl think the same. It concerns me that most would.

Mental illness is a terrible affliction thankfully most of us don't lose touch with reality in such a way to be a danger to others.
For those that do, the coming round and realisation must be horrific.
Believe it or not but some do spend the rest of their lives trying to attone for what they did.
They work hard to see their workers and attend their classes and take their meds.
This I know from personal experience. Some people can do awful things.
This doesn't make them terrible people.

Anyway all the best to the OP. I know she did what was right for her and that in this instance, is all that matters.