I am being supeoned for a issue from a previous job as a Security Guard where I accidently knocked someone down

2 years ago I worked for a security company that was contracted at a major clothing store. Myself and a manager for the store was escorting a shoplifter to the back. The shoplifter pulled away from me and ran towards the exit. I took off after him and accidently ran into the manager knocking him down. Now 2 years later I get a call from the security companys lawyer saying that I will be asked to give a deposition from his attorneys and that she wants to meet with me to go over the details. My question is should I retain my own lawyer to go with me. Should I even be meeting with her first and can I be sued personally. I quit the security company shortly after the incident but not because of it.