I think his motive was to give them a piece of his mind. I think they may have poopooed him and that really ticked him off.
If you reread my theory , he didn't
go up there to hurt them. I believe the part on the bridge was an accident.
This above is only my wild speculation but it answers some
of the questions asked and how,
in my own mind I can explain it.
No screaming, no gunshots, no lugging both girls across the creek (only one), never had to subdue them because one was hurt and the other was terribly concerned about her friend.
Hi Razz,
Please correct me if I am not understanding your working theory.
B.G. appears on bridge
One of the girls falls or is pushed off bridge either purposefully or accidentally
The other girl is hysterical
He says "go down the hill"
The girl who fell is dead
He kills the other girl
He removes their clothes to make it look like sexual assault/murders
All of this because he won't risk going to jail because he "blames" them - if they weren't on bridge this wouldn't have happened.
Am I getting it, Razz?