May 26, 2013 11:36 pm Teen Stabbed to Death by Boyfriend: Police Police say 17-year-old Julianne Siller was stabbed to death by her 16-year-old boyfriend as they were walking along a trail in Skippack Township. NBC10’s Daralene Jones reports. US & World Videos 0:20 Teen girl shot in Southwest Philly, suspect in custody 0:27 FBI inspects American Airlines plane at PHL after bomb threat 1:40 Penn officials urging pro-Palestinian protesters to pack up and leave campus 2:17 Clear the Shelters: Meet Tails 0:38 Jury says Philly owes $16 million for wrongfully convicted man