https://www.facebook.com/ktvu/videos/10155546949247061/   Four people were shot on Tuesday afternoon at YouTube headquarters. A female shooter is dead of a self-inflicted gunshot wound, according to police. Victims are being treated at area hospitals for gun-related injuries.   Earlier: BREAKING: YouTube shooter is a female and she is down, multiple law enforcement sources tell @NBCNews – @anblanxhttps://t.co/YQ0x5rJFwo … Continue reading Four People Shot at YouTube HQ; Shooter Dead: Live Video