WINNENDEN, Germany — German authorities are looking into whether to press charges against the gun-collecting father of the teenager who went on a shooting rampage at his former school on Wednesday, killing 15 people. The motive for the attack by 17-year-old Tim Kretschmer remained unclear a day after the massacre in the southwestern town of Winnenden. The teenager, who neighbours described as a loner with a fondness for violent videos, appears to have taken his own... (GunPolicy.org)