I'm not sure what kind of role playing game you are involved in, or whatever it is that you are describing. I'm going to assume that this thread is not research for your game script and just give you a couple of facts. Warning: you may not want to hear this.
Nurses, like anyone else in the field of health care, are held to a higher standard. We work around people who are vulnerable, even if just for a short time. We work around expensive equipment and powerful drugs. We have access to highly sensitive, private information about people. That is why nurses are required to be honest and responsible, with sound judgement and personal maturity.
There is a background check before getting licensed or hired as a nurse, and that includes checks for criminality. Felony convictions are usually disqualifying in the first instance, but there is sometimes a process that can be undertaken to remedy that situation. You would have to check with the Board of Nursing (BON) to find out about it.
The kind of game you describe seems to be pretty much all consuming, and I wonder if you would truly be able to shake your bad guy persona while working. Another consideration is that nursing school
is really hard and requires a lot of study. You will have to decide whether your game being a nurse is more important to you.
Finally, I would not hire someone who was acting out in the way you describe because to me it indicates insufficient personal maturity.
As the previous poster suggested, you might want to stop playing this game. Aside from anything else, you are opening yourself to be the victim of crime. What would happen if some bystander thought it was all for real and decided to rob you of your money and drugs? What would happen if some gang decided you were "false claiming"?
Try to get the interest and excitement you crave in a safer way.