The Inner Darkness

Five years ago, serial killer Tom Kerr was imprisoned. Today, he's out to reveal the resting place of his final victim.
However, Detective Wisting is taking no chances. Kerr is chained and handcuffed. The police have dogs and guns.
But minutes after entering the forest, Wisting's officers lie broken and bleeding. And Kerr has vanished into the woods.
Too late, Wisting realises their error. What's worse, Kerr had an accomplice who was never caught . . .
Now two murderers are on the loose - and Wisting has just hours to find them . . .