I find the MO law concerning this very interesting. It has a lot of helpful information about how the GJ works also.
So lets say for argument sake that MB did assault Officer Wilson. Officer Wilson would absolutely know that MB had just committed a class A felony because he was the one being attacked. If this is true and I believe that it is.....when MB assaulted OW he became a suspect in a Class A Felony.
So when DW tried to stop MB when he tried to escape he knew he had just committed a felony. At that time MB had turned into a suspect, imo. He was no longer just someone walking in the middle of the street but his actions were felonious toward DW.
If the jury follows the law... as they will take an oath to do... by the MO law they will find the deadly force reasonable, imo. DW knew that he had already been attacked by MB and it is reasonable to believe he could go on to attack others or MB could even return to attack him.
Even if DW didn't know about the strong armed robbery, which I am not convinced he didn't know by that time, then it does show that MB seem to have a big chip on his shoulder that day and was aggressive toward others. Anyone that assaults a police officer must be apprehended and that is what DW was trying to do. IMO
What does Missouri law provide on police use of deadly force?
Missouri law gives police officers broad power to use force to make an arrest
or prevent a felons escape. It states: A law enforcement officer in effecting an arrest or in preventing an escape from custody is justified in using deadly force only
. when he reasonably believes that such use
of deadly force is immediately necessary to effect the arrest and also reasonably believes that the person to be arrested (a) has committed or attempted to commit a felony; or (b) is attempting to escape by use of a deadly weapon;
or (c)
may otherwise endanger life or inflict serious physical injury unless arrested without delay.
http://news.stlpublicradio.org/post/whats-grand-jury-how-will-it-work-ferguson-case
So MB fits the law both in A and B.
And if it is true that MB attempted to escape but turned around and came back toward OW then IMO he had every right to shoot him. He had already been attacked by MB once so he knew he was dangerous.