CHICAGO (AP) — The first journalist to publicly question Chicago police accounts of the shooting of black teenager Laquan McDonald won’t have to testify in the criminal case of the officer charged with first-degree murder in the killing.

Cook County Circuit Judge Vincent Gaughan told a Wednesday hearing that he was quashing a subpoena from Officer Jason Van Dyke aimed at learning how Jamie Kalven obtained details of the 2014 shooting.

The judge concluded that the defense didn’t show Kalven’s testimony was relevant. Kalven said he wouldn’t reveal his sources, even if asked under oath.

Officers had said McDonald lunged at them before Van Dyke shot him 16 times. Kalven reported that video actually showed McDonald walking away at the time.

Several media outlets, including the Associated Press, backed Kalven in court filings.