Yes, I don’t see how any confidentiality agreement or recantation he might have signed has any bearing if he is called to testify in a criminal trial. Unless Elmo and the accuser got married, he could be compelled to testify.
Interesting thought here:
If a minor was subjected to criminally conducted sodomy, then later as an adult "married" the perpetrator (under the change of definition in some states), would this "partner" be prohibited from testifying against the perpetrator, as the wife in a traditional marriage would not be permitted to testify against her husband? Especially, if the couple were "united" in a same-gender marriage state, but now living in a state where same-gender mutual gratification was not seen as a marriage but as sodomy?
Hmmmmmm.