https://www.facebook.com/help/contact.php?show_form=unauthorized_photo_underage
I found this helpful. If someone who is not my childs parent posts a picture I can have it reported & removed. It's really great if you don't want random people posting pics of you kido!

Re: Link in post: How to report a photo on FB of your child if under the age of 13
now what if your ex does it to be spiteful when both people have agreed initially to keep kids pictures of facebook for security reasons?
for example- lets say my ex does it with my kid and i have custody, can i have it removed?
I'm not sure because you have to file the report and they do it case by case. But if you have full custody then your ex has no rights to your child, this should include photos.
Landon & Porter
1-10-07 & 5-11-11