By law they have to treat the case of sexual harassment pretty seriously. I am willing to bet this is the deal; they know she's full of it, but they can't not say anything at all to you about it becuase then they could be in deep doo doo even if you didn't do antyhing, so they called you to the office and gave you some bS verbal warning.
I assure you my friend had they had evidence, you'd be gone. They won't do an investigation because they know she is full of it, and want it all to go away.
"to answer your question yes I have. I told this here a few times, girl I was not even really friends with, a girl who just took it upon her self to follow me around lol. She asked me did I go to the gym and I said yes, and she asked could she come. She was anorexic and would relapse (met her in AA) becuase of image issues, i couldn't say no, i figured i was helping out. I mean she wasn't ugly (at all actually) but, i never hit on her, never touched her, nothing. then, she would follow me to subway afterwords. Then we'd go swimming together. I mean she was cool i had nothing against her, besides the fact that I was in a relationship, she had 1. just tried to kill herself like 6 months earlier (Strike 1) 2. had a 8 year old (strike 2) and 3. was "separated" from her husband (strike 3!!)
Anyway, one days she texts me and asks me did I want to go bowling. This was the first time, we had not going ot the gym and she was just asking me to do something with her for the hell of it. We had went to get food and stuff but I mean, after we worked out. I said not really thanks for the offer though. She texts back and says well, if you ever want to hang out just let me know. I say okay but I think I like our relationship where it is. So the next day, actually yes it was the next day, everyone in the meeting is looking at me funny. NO one will talk to me. I'm like well scre you guys too lol. So I knock on my door the day after that, police. she filed a report saying I harassed her. The fact that I am black and she was white, and cute l didnt' help either. They wanted me to come down for questioning the next day. I went, brought an attorney with me and it was squashed within about 30 minutes, didn't have a shred of evidence, she even couldn't get her story straight. She had said I did something with her on this and this day and my GF was able to confirm that I was actually with her at that time lol. That did it. Anyway, nevertheless, even thoughts he had just tried to commit suicide, there were alot of people in AA that were looking for a reason not to like me and found one and just stuck with it. Mind you i had like 4 years clean at this time but none of that mattered. they took her side, and I left AA, it was just that time for me to move on with my life.
With all that said I hope she gets better. I was pretty traumatized by the whole thing at the time, but I've moved on and I'm better for it, and have no hard feelings, though I want nothing to do with her. I know she relapsed. She has a kid , no one deserves that crap what she puts her through.