Do o have the right to call the cops if my ex fail to return our child at the time he was suppose to?

I'm in a timesharing ligitation and there isn't any temporary time sharing in place. Our child had her first over night and my ex told me he would drop the child of in the morning. I messaged him asking what time he will be bringing the child back and no response. I'm really worried because it the first time the baby is having an over night and I don't know if everything is ok or he will bring her back. I mean if he wasn't gonna be on time wouldn't be appropriate to at least message me and say something. I'm freaking out if something is wrong. He is the father and its recognize by the court but am I allowed to call the cops if I haven't herd from him if we made arrangements to drop the child off and he hasnt