Mueller, the 34-year-old ex-wife of Charlie Sheen was arrested Friday night in Aspen for cocaine possession and assault, a spokeswoman for the Aspen Police Department confirmed to PEOPLE.
But while the court will ultimately decide what is to become of Mueller, a source close to her tells PEOPLE: "Brooke can't stay sober on her own."
The source adds: "Maybe this [arrest] will force her to go into a treatment center for a long stay. Thirty-day rehabs won't work for her.
"Her family has been trying to get her to do this, now maybe the court will force her to get the help she needs! She has enough family to take care of the kids while she's away."
Mueller's rep, Steve Honig, told PEOPLE on Saturday, “We are declining comment.”
He later said, "I think anyone who is truly a friend of Brooke's would not be spending their time talking anonymously and behind her back to the media. I seriously question the validity of any comments made by these people alleging to be friends with Brooke."