Who killed Voight's son's killer?
That was the big question on Chicago PD Season 5 Episode 13 when Voight got word about the body being found.
Meanwhile, an El Salvadoran gang infiltrated Chicago and Intelligence joined forces with a visiting detective to try and bring the crew's reign of terror to an end.
Also, Antonio found himself getting close to a new detective, but he was shocked to the core by a key fact about the person.
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.