When the state of Minnesota was presenting its case against Derek Chauvin for the murder of George Floyd, prosecutors called on Katie Blackwell to serve as an expert witness.
Blackwell had been with the Minneapolis Police Department for nearly 20 years and served in a variety of roles as she climbed through the ranks. Most importantly for the prosecution, she served as the commander for the Training Division and had extensive knowledge of department policies.
She was on the witness stand for 38 minutes. About 30 seconds of that testimony was used in the popular and controversial documentary, “The Fall of Minneapolis.”
How her testimony was presented and edited in that scene, and how it was depicted in a book the film is based on, led Blackwell to file a defamation lawsuit against the conservative news site Alpha News, its star media figure Liz Collin and several other defendants last week in Hennepin County District Court.
Blackwell contends Collin lied about her, and “clouded her career.” But now she faces what could be a challenging task: proving it.

Legal experts in Minnesota say proving defamation against media organizations like Alpha News and journalists like Collin is intensive.
Blackwell is currently the assistant chief of operations for MPD, a No. 2 ranking officer in the department. She will have to show that when Collin published her book “They’re Lying: The Media, the Left, and the Death of George Floyd,” and when “The Fall of Minneapolis” was released, those involved knowingly lied about her. If she can prove that, she’ll also have to prove those lies stunted her professionally or injured her personally.
Jane Kirtley, the Silha Professor of Media Ethics and Law in the School of Journalism and Mass Communication at the University of Minnesota, said people considered to be public figures are asked to prove “actual malice,” which is a different legal standard than simple ill will.