The Chicago Code Season 1 Episode 13

Colvin thinks she finally has Gibbons when Killian agrees to testify before the grand jury. But Gibbons is not going down without a fight, he smears Colvin, and tells his mistress to do something, and he tells Wysocki that his brother was killed because he went bad. He even sends Wysocki proof which he sets out discredit but only gets more verification.