Legal Question in Family Law in Maryland

He can threaten all he wants, but in reality it's extremely unlikely that a court would grant him custody, assuming you are doing a good job raising your daughter and she is well cared for. No court is going to upset the child's stability. Of course, if he has been exercising regular visitation in NC you will have to make arrangements to allow him to continue to have those visits and may have to contribute to the expense of travel between NC and MD. It sound like he doesn't contribute much if anything for child support given his lack of employment. I assume you were granted custody at the time of your divorce, but if that issue wasn't resolved then you should file a petition for custody here in MD after you have lived here 6 months.