3:04 PM PT -- Lyssa tells TMZ the cops were called over a fight she was having with her girlfriend. Lyssa says when officers arrived, she put her hand up in order to stop them from entering her room. Lyssa alleges the cop grabbed her by the arm and arrested her. She says she plans on filing a report for police misconduct against the officers.
As we've reported ... the Chapman family is going through some turmoil right now. Just months after the death of Dog's wife, Beth, he proposed to her best friend and maid of honor at their wedding, Moon Angell, on "The Dr. Oz Show."