So you didnt protect her during the day.
Out of memory - since looking through ISO requires work - I recall that Zem said she would know if she was hit by a superkill, she insisted that she had no knowledge of being shot by a SK during the night.
With michelles claim this adds up.
She did say that she had some sort of super bulletproof vest - but I do not remember if she said it was 1 shot or not.
I'm trying to find the post