Difficulty: Moderately Challenging
Step1
You have to understand that your lawyer is a legal agent whom you hired to represent you in a legal action. They know and understand the law and legal issues where you don’t, and they know how to present your matter in trial in accordance with the laws concerned. This is their job and this is why you hired them.
Step2
If you hired this lawyer as your legal agent in a litigation matter, then it is not likely that he or she has personal knowledge or involvement in your issues, ie: your ex-tenant owes you money for rent arrears and damages - the lawyer has no personal involvement with these issues. You have given your lawyer all the facts and it's those facts that enables them to proceed with your case.
Step3
You need to go to the courthouse and get an information package on legal procedures and learn the obligations and responsibilities of a lawyer. Find out if a lawyer can be both, legal counsel and witness.
Step4
You need to explain your concerns to your lawyer and get his/her legal advice on your suggestion.
Step5
There is a legal process whereby you can dismiss or fire your lawyer, relieving them of their legal responsibilities to you. If the lawyer agrees to not continue with you in their legal capacity and will testify for you instead, you need to consider this: will you be losing good legal representation for hearsay evidence? You need to count the cost of your decision. See the article, How to Know the Difference between Facts and Hearsay Evidence.