I thought the reason was...they knew using 8 snipers there was a good possibility the head would be blown off. Then it was necessary because JFK was shot in the neck and the one bullet story wouldn't work. AND I wondered at the time...why make the swearing in on the plane not giving our First Lady the respect of changing clothes...(switch?) and Johnson smiling...I'll NEVER forget that.
Both reasons were mentioned. They even stated that Liddy had not shot him the way they needed for him too. Another reason why that guy was brought in to change the appearance of the wounds. Either way, it just seemed far-fetched to me.
But, then again, so would having your own government kill your President.
They asked Jackie to change her clothes but she refused. She wanted everyone to see what they’d done.