My 4yo son and 6yo daughter are being told completely negative lies about me. For example, we exchange the kids at a police station along with other families, after i gave her the kids i was conversating with a police officer and i overheard her saying "the cop is talking to him because hes a bad guy!"

This is not okay!

Theyre being told im a drunk and i drive drunk with them. When greeting me they say things absolutely untrue and randomly bad about me!

How can i stop this asap!

I have multiple recordings of this and am seriously contemplating getting a lawyer and returning to court

(Los angeles) if any recommendations please tell me