Hopefully there is documentation around all these facts. What are you waiting for? Take action now. If you were assaulted, were the police contacted and incident and charges filed? Was Human Resources involved and if so what were their written conclusions and remedies? If you have an active and ongoing workers compensation claim, pursue it and/or find out now in writing what your Union's involvement if any, is all about. Consider consult with workers compensation and/or injury attorney in your jurisdiction with the specifics of matter and for file review. Click on "Find A Lawyer" tab above and you will be able to figure out best options.