#ChicagoPD S4, Ep. 15 "Favor, Affection, Malice or Ill-Will" Preview/Clips/Promo

When Lindsay  is tipped off about a grieving father looking to avenge his daughter's death, Olinsky goes undercover as a hit-man-for-hire. With Gang Intelligence lacking enough evidence to arrest the original gang-banger in question, the team works to re-investigate the case. Meanwhile, Ruzek  comes back after finishing his undercover assignment only to have Voight knock him down to patrol duty. 

You can catch Chicago PD Wednesday night at 10/9c on NBC.