Blue Bloods 9x15 - Blues

While off duty, Danny encounters a gas station robbery inprogress and is forced to use his weapon, leaving him shakenand his family and co-workers concerned. Also, Eddieapprehends a turnstile jumper who pleads for leniency byoffering information on a missing weapon that's vital to one ofErin's cases, and Frank learns that a top officer in hisdepartment has a dark past.