I was wondering what happens in Michigan in between time a baby is first born and the parents go to court to establish a custody plan. If I were to drop my child off at his/her fathers house for a visitation could he legally refuse to give the baby back to me when I went to pick him/her back up? If I were to call the cops would they do anyting? He will be established as the childs father at the time of birth. I plan on giving the baby his last name and he will be on the birth certificate and everything else that goes along with that. So since we are both legally the parents of the child who has custody?