OK.
Sorry i wasn't more clear before.
If Porscha was just a random townie who somehow had the vest, there was no reason to claim it. The fluff text was quite clear that the doctor saved whoever died.
However, I know that she targeted herself somehow.
Either she wasn't the doctor and used the vest - which a) why would she have it, and b) why would she tell? - or she was the doctor and made a questionable play.