A tiny percentage do. But then they’re probably smart enough not to engage in a chase and shootout on a public highway.
I met and spent a lot of time with a man I consider a borderline sociopath in Australia.
He fit in well with society. I don't think he would have blinked if he thought a murder would benefit him some how, if he believed he could get away with it.
He is now deceased. Cancer got him.
In some jurisdicitons, 70% or more of murders are never solved. New Orleans cleared 28% of its homicide cases in 2016. Detroit cleared 15%.