A family lays flowers at the shopping centre where a lone gunman killed six people in Alphen aan de Rijn April 10, 2011. The gunman's deadly rampage through the shopping mall was met on Sunday with disbelief by residents of the quiet Dutch town who once thought such carnage couldn't happen in their country. Dressed in camouflage trousers and a bomber jacket, Tristan van der Vlis opened fire in a parking lot on Saturday and walked calmly into Ridderhof mall, where he killed five people, most of them elderly. He wounded 17 others, one of whom died later. The 24-year-old gun club member then shot and killed himself. REUTERS/Michael Kooren (NETHERLANDS - Tags: CRIME LAW)