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A city attorney spokesperson confirms to ET that Heather Locklear and Jack Wagner had a "physical altercation" back in December.
ET has learned that police went to Wagner's house, a report was taken, and then given to the city attorney, who wants to talk to the on-again, off-again couple about the law and crossing the line.
No charges have been filed, and Locklear and Wagner will be called into the attorney's office in a few weeks.
Last week, Locklear was taken to Los Robles Hospital and Medical Center in Thousand Oaks, CA, after she had taken an ill-advised combination of drugs and alcohol.
A source tells ET that Locklear was "having a hard time" with her on-again, off-again relationship with Wagner, and that although they had called off their engagement, they had gotten back together, but had recently broken up again. The source reports that a major issue in her relationship with Wagner is that he is sober and she is not.