Kara Borden was 14 but we don't know the age of the other girl. She may not have been a minor. The information isn't there to either support or refute that conclusion yet many on the thread are assuming that the first girl was also 14.
I also noticed the prosecuter has not withdrawn the kidnapping charges yet but has announced his intention to do so. Looking from a distance thsi looks like a case that will be settled with a guilty plea.