
Quoting
EJay
16 years ago two high school kids, both under the age of 18 with a difference in age of 1 year, got drunk and had sex. No prosecutor is going to prosecute that, even if it was within the limitation. It sounds like the experience has been traumatic for your wife. Perhaps she can seek closure some other way, maybe through counseling or maybe even by talking with person involved.
The Bill Cosby case was much different than this.