I will be out doing puppy training this morning, so have to update and run out for the training. Since player 2 has not yet responded I will take the turn for him.

Player 2

Action 1: Shoot at Walker in his space with is pistol. Roll 3 = fail.
Action 2: Try again. Roll 6 = success! Walker is now dead.
Action 3: Shoot at Walker in the spawn zone. Roll 1 = fail.

I just realized that player 5 is also in the space with player 2, so player 2 is limited to bare-hand combat.
That means that the Walker is NOT dead and has only a half point damage on it.