Young, who is now being detained at Long Creek, was 12 weeks shy of his 18th birthday the night police say Stewart was strangled and beaten to death on Crawford Pond's 100-Acre Island in Union. If prosecutors have their way, the juvenile will be put on trial for murder as an adult.

In her first interview since police charged Deven Young with Stewart's murder on Friday, Mic Mac Campground owner Katharine Lunt explained to ABC News the horror that engulfed her idyllic corner of rural Maine since July 2, and how fiercely driven she's been to protect it.