In this case it is actually irrelevant if they are a tinok shenishba or a mumar.
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?? ??????? ????? ?????, ??? ?????? ????? ??? ?????? ??? ?????, ???? ?????? ???? ????? ?????? ??????, ??? ??? ?? ???? ????? ?????, ??? ??????? ???????? ???????????, ?? ??? ??? ?????? ???? ??????? ?????, ??? ????? ???? ??????? ?????? ????? ???????? ?????, ??????? ?????? ?????? ?? ????? ????? ?? ????, ?????? ????? ???? ??? ?????? ?’ ????, ????? ????? ????? ???.
???? ? ?? ???? ??? ????? ??????? ??? ????? ???, ????? ??? ???? ??????? ????, ????? ????? ???? ??? ??? ?? ???? ?? ???? ??? ??? ????.
I have heard too many people quoting se’if dalet, yet they are ignorant of se’if heh, which is a Gemara in Sanhedrin 47a and is brought down in the beis yosef siman 345 and the shack in siman 340. Clearly these victims should be mourned as per the halacha.