I didn't see this question anywhere, so maybe I'm over-thinking this, but I have to ask.
SPOILER ALERT
Objective 1C of Blood Ties says the keeper wins if the blood relative has 0 sanity and 0 health. Usually when one of the investigators dies that player gets to bring another investigator into play unless the objective has been revealed. In this scenario if that investigator was the blood relative then the new investigator that comes in is also a blood relative. So if the keeper successfully kills the blood relative before the objective is revealed does he win? Or does a new investigator just show up next turn as the new blood relative?