Matt Wittig didn’t know four years ago that his signature on his driver’s license would result in five strangers getting a chance to live longer. He couldn’t have known then, at the age of 16, that his death four years later would elevate him to hero status in the eyes of his family and of those strangers who needed organ transplants to have a chance at survival. The 5 strangers – 4 of them from southeast Wisconsin – received one or more of Wittig’s organs in transplant surgeries that occurred Friday, hours after his death Thursday.