COLUMBUS, Ohio—An Ohio father can fight the adoption of the children whose mother he killed, after a divided state Supreme Court said there was a good reason he hadn’t been in touch with them since the slaying: He was following a judge’s order not to contact them. Under Ohio law, parental consent is not required for adoptions if proof exists that a parent had little or no contact with the child for at least one year before the filing of adoption papers. In the current case, the father had previously lost his attempts to block the adoption of his daughters by the girls’ maternal grandparents, who took custody of the children after their mother was killed. An appeals court agreed the father couldn’t use his imprisonment to justify his failure to contact the children, since his actions led to the prison sentence. Then in 2019, the state Supreme Court ruled …