As the final moments of a teenager’s killing rampage in Germany emerge, a debate is raging about how it could have happened. The school shooting near Stuttgart left 16 people dead, including the 17-year-old gunman.One of the big questions is why the teenager’s family had 15 firearms at their home. And how did he get hold of a nine-millimetre Beretta pistol? Tim Kretschmer shot nine students and three teachers at his former school in the town of Winnenden, as well as three other people after he fled the scene. The police are also raising the issue of violent video games. Police spokesman Ralf Michelfelder said: “Last night we confiscated his computer and carried out a preliminary analysis, and we’re now carrying out a more comprehensive search. We found typical video games, which match the image of someone who goes on a killing spree, like Counter Strike and others.” There are also now widespread calls for tighter gun controls, although Germany already has relatively strict laws. It has also been suggested that Kretschmer deliberately targeted females: he killed three women teachers and eight of the dead students were girls. This was the third deadly school shooting in Germany in seven years, and came only hours after a rampage in Alabama in the US that left 11 people dead.