Apprehended Violence

S1 E6: Nick finds a young girl locked in a caravan and wants to charge her father for neglect. Peter Horton comes at the police station confessing to a murder committed over ten years ago - is he telling the truth? Elsewhere, Roz is stopped for speeding by Nick and loses her license. She begs Wayne for help but Nick won't budge. Roz later learns that a speeding driver killed Nick's wife and daughter.