You're an employee where exactly? At Chili's or somewhere else?
Anyways, if you're an employee at Chili's you would know if you have a cctv in your establishment.
If not, you can talk with the branch manager and tell him on why you need to see the tapes and be honest and be calm to habe higher chances of him allowing you to see the tapes. (If there are any.)
Do everything ASAP. Then if you do have the tapes, you can go to the police station and have them filed.