What was the true cause of the fire that claimed multiple lives?
That was revealed on Chicago PD Season 6 Episode 2 when Intelligence raced to find the man responsible when it emerged that he could be gearing up to do the same thing once again.
Meanwhile, Halstead took all of it personally, prompting his team members to wonder whether he should sit out of the mission.
With the killer on the loose, what did Halstead do to remain on the case?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.