There has been a statement from Mercedes Carrera now:

https://www.xbiz.com/news/241984/mercedes-carrera-issues-statement-about-false-allegations

She claims it's a false accusations as part of a custody case — which happens all the time — usually the other way around: mother accusing the father.

Of course now that they found drugs, even if the child molestation changes turn out to be false, she still looses custody.