6 Things You Don't Know About Charlie Sheen

As more details surface about Charlie Sheen's Christmas Day attack on wife Brooke Mueller, we're learning more about his history of violence against women as well as Brooke's terror during the attack. Here, five things you might not know about Charlie, Brooke, and what happened on Friday.

1. He pulled a knife

The 911 tape released today reveals that Brooke was terrified for her life when her husband pulled a four-inch knife on her. "My husband had me...with a knife, and I'm scared for my life, and he threatened me," she told the 911 operator. Brooke went on to explain that other members of her family had separated her from Sheen. Officers arrived a few minutes later at the rented home in Aspen to arrest Charlie. Why Do Victims Of Domestic Violence Stay?

2. He choked her

Radar Online reveals that in addition to threatening Brooke with a knife, Charlie held her down and choked her; when police arrived, she had red marks on her neck. One of the cops who responded, Officer Rick Magnuson, told Radar that Charlie had pinned Brooke on a bed, grabbed her throat, and said, "You better be in fear. If you tell anybody, I'll kill you." He also allegedly said that he could hire ex-police officers who "know how to get the job done and they won't leave any trace."

3. This is so not the first time for Charlie

Charlie pleaded no contest to attacking his girlfriend, porn star Brittany Ashland, in 1996. Ashland said he threw her on the kitchen floor of his home and split her lip open. Before that, Charlie accidentally shot his then fiancée, Kelly Preston, in the arm in 1990. And during their divorce, Denise Richards successfully got a restraining order against Charlie, telling a judge that he’d repeatedly threatened to kill her, and hit and pushed her while she was pregnant or holding one of their children. 5 Celebs Who Overcame Domestic Violence