The Daily Beast has a long profile on the subject:
Clarkson’s dream of becoming an A-lister ended in a bang in February of 2003 in the hallway of demure music producer Phil Spector’s mansion in Alhambra, Calif. Spector, who worked with the likes of the Beatles, the Righteous Brothers and Ike and Tina Turner and created the “Wall of Sound” that revolutionized the recording of rock music, was tried twice for Clarkson’s murder and convicted of her shooting death in April of 2009. He was sentenced to 19-years-to-life in prison.
Now Laughlin, who was vilified at Spector’s trial for testifying that Clarkson was in such a state of abject despair that she may have pulled the trigger, is working on a movie project with Vesuvio Entertainment, chronicling her relationship with Clarkson. The movie, tentatively titled All Six Feet, is scheduled to begin filming in early 2013. Laughlin says she is involved in the project partly because she wants to dispel “false rumors” that she was paid millions by Spector to testify for the defense.