Either you haven’t read Tenn v Garner, or didn’t understand it. The SCOTUS voided the preexisting common law “fleeing felon” doctrine, and said the fleeing person must still pose an imminent threat for deadly force to be justified in apprehending them. The real issue here is Slaver’s state of mind and factors contributing to whether he actually believed Scott to be a continued imminent threat.
That's what I was getting at. My feeling is Slager might have been disoriented from being tazed. My comment on shooting a fleeing suspect was in response to some other poster's comment about it never being justified to shoot a fleeing suspect. The SC's ruling was that in certain situations which you mentioned it is.
In fact, I'm saying the new evidence, if it is true, does not necessarily exonerate Slager. But if I'm Slager and I just got tazed, my mind might be a little confused at that point. I've never been tazed, and I've never been a policeman.
But my point is that we don't know the state of mind of Slager. We do know he was assaulted by Scott. And again, let's let everything shake out before we accuse Slager of first degree murder or murder of any kind.