How much trust can you put in forensic evidence?
They discovered her naked body with a puncture wound to her neck and blood everywhere. And brutal though her death was, this was the second such case West Yorkshire Police had running. Both unsolved. Until they found that one elusive piece of evidence.
Scenes of Crime Officer Roger Conniston has worries aplenty as he tries to catch a fellow officer dealing arms. The last thing he needs right now is arresting for a girl's murder.
Of course he didn't do it, but even he has to admit the evidence against him is compelling. All he has to do is prove his innocence and find the true murderer. Not easy when no one believes him, and when the officer holding him in the cell is the one he's been spying on.