Identification of Booth's body

[Gene C]

How far apart would the scar from Dr. May's surgery be from the gun shot wound in the neck Booth received?
Could the discolorization of the skin from the gun shot wound make the surgery scar difficult to see?

When Dr. May asked that Booth be lifted to a sitting position, for identification purposes, would rigor mortis have set in making that difficult?

Did Herold ever acknowledge that it was Booth who was shot at Garrett's?