It does not look like he was hit in the ear and it does look like we can see his necklace flying away from his neck, apparently severed somewhere in his front. ABN
Kirk assassination highest quality and most detailed camera original to date
Do your best. Speak the truth.
American Buddhist Net 
The triggersmart channel on YouTube has a lot of interesting content on the Kirk murder.
I checked the channel and it does look pretty good. the one today was going over old ground, so not very interesting