She could be self-medicating, for ADHD if she is untreated or if her treatment isn’t working well enough, or for anxiety (social or general).
Have a chat with her that there’s a better way to help her get through the day or manage social situations, or whatever she’s struggling with. Let her know that you’re offering to help her get that help. Remind her that she could end up arrested and what those consequences look like. I’m not advocating a fear tactic, but rather informing her of all the risks. BUT, you have to offer to help her with alternatives in this conversation too.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism