New partner Sam Casey joins a grieving Ronnie to find out who shot Matt dead. Sam suspects an accomplice of the recently convicted Mark Ellis but the trail ultimately leads to Jamaal Clarkson,a youngster whose brother Kieran was murdered in 2003,though the police closed the case as a suicide. Jamaal believes they were not interested as Kieran was black and tells Ronnie he knows Ellis was the murderer. It was his intention to kill Ellis but,on discovering that he had been sentenced,shot Matt instead as an act of revenge against the apathetic police. Whilst Alesha and Jake prepare a case of murder against Jamaal,Doug Greer,his barrister argues that the boy is himself a victim,whose crime was motivated by desperation,not calculation. 　　译文(2): 新搭档山姆 · 凯西加入了悲痛欲绝的罗尼寻找杀死马特的凶手。山姆怀疑最近被定罪的马克 · 埃利斯的同谋，但是线索最终指向了贾马尔 · 克拉克森，这个年轻人的弟弟基兰在2003年被谋杀，尽管警方以自杀结案。贾马尔认为他们不感兴趣，因为基兰是黑人，并告诉罗尼，他知道埃利斯是凶手。他本打算杀死埃利斯，但发现自己已经被判刑，于是枪杀了马特，作为对冷漠的警察的报复。当阿蕾莎和杰克准备起诉贾马尔谋杀的时候，道格 · 格里尔他的律师认为这个男孩本身就是受害者他的犯罪动机是绝望，而不是算计。