My minor nephew molested my minor daughter
Approximately 10 years ago, my sister and her children visited for a weekend of swimming. My daughter, then about 6 or 7, went up to her bedroom and was followed by my 14 or so year old nephew. My daughter has recently told us he approached her and touched her either through her suit or around it, then offered her to touch his penis, apparently having it out. This all came to light almost ten years later when my daughter told my wife. We have no proof but my daughter's statements, she cannot give us a date it happened. My nephew a few years later, was sent away when it was proven he, when he was 17, had sex with an eleven year old.
My wife and I are furious he did this and want to prosecute. My daughter is now almost 15, and my nephew is in his 20's. How do we pursue this?
I confronted my nephew, and he claims he does not remember anything like this happening, my sister and I are now on non speaking terms because of her denial.
My daughter has been to consoling sessions which have helped her deal with this.