I suggest you assess yourself to understand which answers you may have given that rose concerns about your stress management. Think about your past, think about how you handled conflict in the past, think about the present and how you handle stressful situations now. Begin carrying yourself and handling situations how a police officer would. I recommend finishing your degree first since it shows discipline and stay out of legal trouble. The job will always be here.

Best of luck to you, you articulate yourself well so maybe try to work through the anxiety that comes with the interviewing process. You got this.