My friend is a problem at work

My friend has a long history at work. Including being written up for insubordination... and being demoted. Honestly, all of those incidents I believe were her fault.

But now she has had another incident. In sum, someone accused her of being drunk at work and other things. Management gave her no notice to prepare and confronted her yesterday. I think she covered but... I also think she lied. Now I don't think she was drunk but I think she was hung over. And I was so shocked when I heard the allegations I thought she should immediately go and talk to the workplace conduct people because (if you truly were innocent) it would be dangerous to have someone lie about you like that. But, my friend, didn't want to do that. So that leads me to believe most of it was true. She admitted to some of the behavior that was minor.. like swearing.

She also had an incident with her manager that she doesn't think was an issue but I think she is really facing action about the manager issue and they are sort of hiding behind this co worker complaint.

My friend now is terrified she is going to be fired. I am unsure... I think if they buy her explanations she probably could just get a write up. If they don't, I think yes, it could be the end... this is a third strike. They advertised for some positions that are essentially what my friend is doing now.. they usually send out notice of these positions to all -- they didn't this time. And they have claimed for years they have a tight budget..... and can't hire people -- but they could if she was gone. The pay for the two positions is roughly equal (entry level) to her salary.

If it isn't the end she can't have any more issues and I think she will. She can't accept that much of what happened to her was her own fault. I faced some of what she did with a bad boss, but I have never been written up for anything, never demoted, and had good reviews during that time.