Hatred of Life and Love- Part 2

Now the team are ready to convict their killer of the two incidents, in which Alan is convinced that the are both connected. The suspect list has drawn a blank, and a time delay on DNA evidence has been costing the team a set back. But when new information comes to light, their killer comes as a shock to the whole team, more to the fact that it is someone who they should've thought of long before it got to the stage they are at; and was Banks right all along...