CCSD QUESTION!

Hi guys I’m wondering what I can do. My little is sister is refusing to go to school. Her deadbeat crazy mom who doesn’t have any custody pulled her out 2 months ago and said she would “homeschool” her and did nothing. She sat in the house for 2 months until Monday morning when I realized what was going on and called her high school to get her re-enrolled bc her mom wouldn’t and my dad (who her and my brother live with) didn’t have time to. He’s always working, works two jobs so he doesn’t know if she does or doesn’t go to school but I do because I have her location. Yesterday was her first day back and she went but today again she didn’t go. My dad sucks at parenting and doesn’t enforce it as much as he should or maybe she just doesn’t listen idk. I’m wondering what I can do to scare her a bit. I wanted to call the non emergency line and see if maybe a cop would scare her and my dad even into getting her to come to school I just wouldn’t want to start any problems at all. Will this bring any issues? What follows something like that happening?