Sheen, 44, was arrested on Christmas Day in Aspen, Colo. for second-degree assault, menacing and criminal mischief after Mueller, 32, called 911 and tearfully choked, "My husband had me with a knife. I was scared for my life and he threatened me." She described the knife as a "switchblade."
In an audio recording of a 911 call, a woman who identifies herself as Brooke tells the dispatcher that her husband threatened her with a knife and added, "I thought I was going to die for one hour."
When asked her husband's name, she waits before admitting "It's Charlie Sheen," and starts crying.
ABCNews.com's Sheila Marikar and The Associated Press contributed to this report.