I read the warrant with horror and revulsion. I wonder how this man kept his heinous acts from his partner (assuming that is true). If it’s true that he had to do it behind the back of the other guy and that guy is innocent than I assume he will fight for custody.
You are assuming the he and his partner weren't doing these things with the boy as well together. I can't say if this guys partner knew or didn't know, pleanty of children get abused by one parent without the other knowing. And others get abused by both parents. However, I know if I were the courts or the cops I'd be investigating this partner as well and I sure would not be granting custody to this other adoptive "father" without a full investigation.
Cruel for him if he wasn't involved, but if your number one priority is the safety of the child, you cannot put the child back into that until you are certain its ok. Which of course is subjective, since I don't personally believe having a child being raised by two gay men is ever going to be a great thing for any child.