Unilaterally and without oversight deleted more emails than she turned over, even you have to admit that seems fishy.
She was either doing more personal shit than work or she was covering her tracks
I have no idea if your statement is true and I have no way to determine if it is "fishy" or not
again, we're right back to things you imagine must be a problem
If you can move it out of the realm of imagination into factual reality then you may have something