But seriously, the statute says he has to deliberate upon the matter for it to be first degree murder. A situation like this does not meet that criteria.
There are just an astounding number of conflicting reports, but from what I have gathered, the cop shot him once while he was running away, then he put his hands up and said "I'm unarmed, don't shoot!" before the cop shot him a few more times for good measure.
You can't see when and where the deliberation happened?
It's boring, but prosecutors always have to explain that deliberation in the statute isn't the deliberation you think of in a lifetime movie, and make sure the jury instructions explain the meaning in the statute. When done adequately, the jury can understand it.
I got premeditation/deliberation for some point in time between stabbing #1 and stabbing #17, even while acknowledging that the first stabbing wasn't premeditated and that I couldn't say which stabbing was the first premeditated one.
This shooting, if the facts are given to the jury as you laid them out, is easy.