Old_Geezer, Slander is very difficult to prove as it is spoken. It is also a highly specialised field of law , the lawyers that specialise in it are VERY !!! expensive. So yes, you do stand a high chance of getting away with it. (unless you slander a millionaire with a good lawyer.) You also have to be able to show that the slander caused you loss or damage , hurt feelings are not enough !
Lying to the police could be charged as wasting police time, and lying in court can be perjury both of which are criminal law cases , not civil law like slander.
lolypop9 Just wait and see if anything happens , I do NOT think it will,
But if the police do want to talk to you, do not be scared,just keep calm and tell the truth.
Do NOT get into arguments with them by saying your daughter is lying, just tell the simple truth, they will very soon see through any lies she tells.