This is likely exaggerated (I'm mostly fluent in legalese). He asked for a second plate, but the waitress told him she had been mistaken when she said it would not count as a second order. He and the waitress got into it. He claims Frosty then wouldn't let him leave -- I think he refused to pay for his firsts unless he got seconds. He says he was willing to pay for what he got, but he wanted to get what he was paying for (i.e. all you can eat). Frosty called the police because she thought he was trying to dine and dash.
What's really important for us here is that Frosty called the police. That means she wasn't afraid of their involvement. It's unlikely she was on the run or hiding her identity because she was a criminal. I'm wondering how public-facing her role was as the restaurant manager, how long she'd been working there, if she started out as a waitress...that lack of fear of the police or public would indicate she wasn't in hiding.
