I am a parent of a child! I have this opinion!
If you really want to call the police i can't stop you , but before you call the police, please think about those point!
1: If you are the student parents, do you want your child was caught by the police? I am also a parent, i don't want my child was caught by the police!
2: the door is already broke for along time, the student can open the door easily!
3:If you don't want the student to open the car park door, why don't you ask a security guard to stand near the door to avoid the student go inside the car park!
4: you guys post this post at yesterday after school, how do the teachers tell to the student? Please think for yourself!
5: Why you say the door is broken by the student? Have you ever saw the student broke the door WITH YOUR EYES? They only open the door!
6: If the student really broke the door, why don't you guys give a chance to them? They are only teenagers!
Those who want to call the police, please think about them!