I was just wondering if the bike was found close to the forest/swamp as opposed to the cul-de-sac street or sidewalks. As for large predators, especially bears, while they can move a body faster than a ‘gator, they’re pretty visible, comparatively.
The bike being left standing with it’s helmet hanging on the bars, did she have friends in the area? Is it possible someone visiting a friend is involved? That could tie in to my thought on mobile pedophiles...