You're analogy is nonsense. Abortion is a business of supply and demand. The abortionist performs a service for a clientele that demands it. Your jailhouse murderer provides no such service nor does he act in the interest of a client. The notion that you can dismiss, as irrelevant, the claim that the market will still fulfill the demands of the public based upon your argument here is truly bizarre.
Let me 'splain' it for you one more time:
A non-sequitur is when the poster speciously tries to equate the death of an individual performing abortions as an impediment to behavior done by someone else performing abortions. It is about as rational as claiming the execution of a murderer will be an impediment to someone somewhere else performing murders.
The only definite result that can be verified with Tiller's murder is that Tiller will never perform another abortion. To try and fabricate a correlation to other abortionists positively or negatively is a non-sequitur.