Is this discrimination based seperation of employement? Involving resignation prior to an incident

I live in virginia, and worked part time for a private EMS company. I had just put in a 1 month notice the week prior. We had an incident at work that involved an equipment malfunction. I was on a crew with 5 people, who all stated the malfunction was present. But I was the only one given disciplinary action (being forced to resign immediately ) while the others including the EMT in charge was allowed to continue working along with the rest of the crew. I have written statements from the rest of the crew that it was from an equipment malfunction. I was also given the reasoning as lies, which I also have written statements disproving. Could this be considered discrimination based forceful separation based off the fact that I had already put my notice in and wasn't as valuable to the operation as the employees who didnt?