It's not likely that Don Matthews' name will be cleared on this one...he went too far.
From all of the articles I have posted and read, Matthews thought of himself as a connoisseur of the U.S. Constitution.
The news media loves stories like this because it gives them ammo against the second amendment in the Constitution.
"2nd Amendment A well-regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed."
Don Matthews spent a great amount of time declaring the importance and values of the Constitution...but in the end...he "crapped" on the Constitution...when he killed Officer Taylor.
On the other hand, all that is known about this incident is what we are being told, maybe there was more to it?