Though the response was rather blunt, and non-explanatory, I tend to agree with jmnixon95. You "once had a coworker" indicates you no longer work with her, and don't really know here that well. Speculating on people you have no interaction with is rather pointless. I realize it's a curiosity thing, but what does it matter? Really? Knowing or not knowing won't change anything for you.
But that's not all. From your own description, you didn't really know her anywhere near well enough for anyone here to form a valid opinion one way or the other. What you've given here is simply not enough to go on.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...