One Step Behind
We are not sure of the release date for One Step Behind. It was released at the box office on 2008-12-14 so we estimate it was released to DVD in March 2009.
Director: Philip Martin
Cast: Tom Hiddleston and Kenneth Branagh
Three youngsters are shot dead whilst having a woodland picnic in fancy dress. The corpses are found, and a friend of the victims is also slain, having told Wallander that his workmate was really gay, and that he is a transvestite, and a wholly murderous one, who adds to his toll of dead by killing a further trio of innocents.