How to get King's outfit in Cyberpunk 2077

After completing The Heist and two gigs for Wakako, she sends a message that starts the Clampdown quest; meet King at the BuryGer diner and accept the job. Enter the prison, head to the bathroom when directed, and interact with the duffel bag under the bench to get King's iconic Coronation Tech Revolver plus his full outfit, including the glasses.