Reposting from an earlier comment I made:
Best we have right now, far as I can find:
Expand for bloody ear photo
My favorite tinfoil hat theory is that one of the secret service members had a razor palmed, which they then used to slice his ear when they took him to ground. I’m not saying I believe that, of course, but it seems the most plausible to me.
Here's a photo of the same ear taken sometime on or before Jan 2019.
Edit to add: Armchair analysis. Maybe it sorta looks like some of the helix (both tubercle and crus sides) flesh is missing from a graze, here?
Expand for a bloody ear photo with lines drawn on it
The answer:
Everyone would have heat pumps.