I have to be honest, having listened to sexual assault evidence in court.
The victims weren't believed. They were 30yos. All manner of shit was trotted out: they were mistaken, they made it up, they lied, they were in on it together and both lied (the victims were complete strangers to each other, only connected by the person who'd abused them), they were mentally unwell (all complete bullshit) etc etc. These crimes took 5 years to come to court.
If your dd was 4/5yo, her evidence can be torn apart easily due to her young age.
It's fucking disgusting.
If it were my dd, I'd be telling her that I 100% believed and supported her, but my best advice would be not to go to the police, but to try to move on with her life.
On the other hand, it seems there is a paedo with continued access to children.
I suppose it depends how your dd feels and what kind of battle she thinks she can face.