I don't think there was sexual assault on either girl - I don't think that is a part of BG's makeup. Based on what is known regarding the relative swiftness and brutality of the murders, I think it was a methodical act, driven by some deep seated anger/personal conflict that probably goes way back in his life, and that he has yet to resolve.
Coupled with this, I think we will discover some of the following:
- that he is likely from Indiana or an adjacent state, but has strong ties to Delphi
- is a young adult pursuing a specific career path, which may or may not be of his own choosing
- between school and/or job training, he "floats" in and out of the Delphi community
- on the surface, is very personable, has many friends & contacts, and overall, a seemingly normal life, but . . .
- . . . has some deep seated conflict he can't seem to resolve, maybe tied to his career path and/or personal life, which . . .
- . . . somehow, psychologically, drove him to commit this act, to "boil over" so-to-speak, in an effort to release his frustration, anger, confusion, emotional pain, etc.
Just thinking out loud.