The only thing that speaks against this theory is, that one person was on the bridge, where the girls have been. What else could have happened in this area, would have happened beneath the bridge probably, on the trail, in the woods. Why did BG enter the bridge? Why was it necessary,
if he wasn't on a thrill-kill mission?
IF the girls took photos of the area beneath the bridge and BG was down there and was afraid of these pics, why did he leave the phone at the crime scene?
It doesn't make sense for me, I'm further wrecking my brain ....