Ex boyfriend of Tenant smashed sliding glass door

[Newton Lim]

I have a tenant call and and said the weed wacker kicked up rocks and broke the glass to the  sliding patio door. I told her that is not normal wear and tear so you will be responsible for the repairs of the door. I suggested she file a claim with her renters insurance. 10 minutes later she calls and says she lied and that and her ex boyfriend who she has a no contact order against came over uninvited and kicked the door in. Her insurance will not cover the cost of the repairs. Am I responsible for the cost of the repairs or is the tenant. She said she does have a police report, but has failed to provide a copy yet.