I'm wondering if they got new information that made them change the direction of their focus because they had a new officer look at the file. When I have watched true crime cases on TV, even years-long cold cases (I know this isn't a cold case), often times the thing that breaks them is a new person with fresh eyes taking a look at the file. I wonder if someone even brand new to the police force was asked to take a look at see what they think and they noticed something that no one else had or others had looked at it a different way. Could be an error in someone's story or an issue with an alibi, etc. Just MOO
Heading off to work and will have to catch up on everything later, but my last thought before leaving is just again how incredibly tight of a timeline the crime had to have happened in. I imagine BG being there before the girls, maybe seeing them and wanting to attack them, but waiting until no one else was around because there were people there that day. I hike solo often, so I don't find it odd that people hike there, even alone, but I admit I was surprised to hear just how many people were at the trails in the middle of a Monday.
The timing for BG would have had to have been perfect and probably quite lucky (in his mind). Perhaps he had even witnessed other people he was considering attacking but there was always someone else around.