I haven't been all the way through the thread so excuse if this info has been posted.
David G. Ludwig killed 14-year-old Kara Beth Borden's parents after they and their daughter argued about her curfew, police said. The girl was last seen Sunday morning at the family's home in Warwick Township, about 60 miles west of Philadelphia.
"We think they're boyfriend and girlfriend," said Seace. "The young girl was out during the night, came home, and her parents confronted her. From what we understand, he came to the house."
http://www.firstcoastnews.com/news/topstories/news-article.aspx?storyid=47277
Sounds like the movie Badlands, starring the young Martin Sheen and Sissy Spacek (also with Warren Oates), which was, in turn, based on a true story. But I can't remember the real outlaw's name.
From what I've heard, police are admitting she may have left with him willingly (still kidnapping as she's 14 and he's 18).
I am beginning to suspect the girl has a role in this whole thing.