Johnny Depp v Amber Heard is a defamation case. But it could have a chilling effect on domestic violence survivors

Johnny Depp is suing Amber Heard over an opinion piece she wrote for the Washington Post in 2018.  (Reuters: Steve Helber)

After six weeks, the defamation trial of divorced actors Johnny Depp and Amber Heard is set to end. 

But its cultural impact is likely to be felt long after the jury returns a verdict.