Gone Fishing

S1, E4: 2006. The case is thrown into disarray when a key witness is found murdered. Tony is horrified as he begins to realise that his generous benefactor, Ian Garrett, isn't the person he claimed to be. In the present day Julien tracks down the dead witnesses’ girlfriend who has started a new life as a primary school teacher. He is intent on re-investigating the links between the dead witness and Oliver’s disappearance.