Just found out daughter is on crack

Frist of all, stop panicking. You’re jumping way ahead without any evidence. You don’t even know if she is really doing crack or how often she is doing it, or whether it is interfering with her life. Why don’t you first find out about that? Then, because confrontation is rarely helpful when it comes to addicts, talk to her about it. I know it is hard, but if you come from a ‘I want to help you do whatever you believe is best for you’ vs. ‘I know what is best for you and I will make you do it’, you are more likely to get somewhere with her. If she admits to use, just engage her in a discussion. Try to get her to point out what the downfalls are, where she’s messing up. I’d use every possible soft approach first. Maybe she wants help but doesn’t know how to ask for it. And mom coming in demanding she get help will just put her back up and the willingness she had will be gone because it is a matter of control. Now, because a child is involved, you do need to see if she is safe. Again if they are out getting high on the weekends, I would approach this from a positive approach and ask if you can babysit during the weekends. I would save the threats till the end, because they are the least effective ways of doing this. Again though, your granddaughter is priority. So you first need to figure out whether she is safe or not.