Season 4 Episode 20 episode 20

Blue Bloods Season 4 Episode 20 “Custody Battle” Photos

Blue Bloods Season 4 Episode 20 “Custody Battle” Photos

104692_d1507bWhen Erin is assigned to investigate a case in which an on-duty police officer is accused of killing a suspect already in custody, Frank urges her to stick to the facts to avoid a publicity scandal for the NYPD.

RELATED | Blue Bloods Season 4 Episode 20 “Custody Battle” Guide

Check out the sneak peek images for "Custody Battle" (airing on April 25) in the gallery below:

Source: CBS