Snipped by me for focus.
I think this is where the theory of two people comes in. To me, it seems fairly likely that two people were involved. I would think that unless one of the girls was somehow incapacitated, she would have ran when her friend was being attacked. Or at least screamed. The family says they were loyal to one another, and I have no doubt that was the case, but at a certain point I do believe self preservation instincts would kick in, especially knowing there was nothing she could do for her friend unless she called/ran for help. So IMO, I would not be surprised if one girl was either knocked unconscious while the other was attacked or there was two people involved—one who held one of the girls back while the other was attacked. It just doesn’t make sense to me any other way. MOO.
I haven't been following this closely as of late, but I'd think that all the BG needed to abduct 2 people is a gun. Look at the Jacob Wetterling case. The perpetrator stopped three boys riding bikes by pointing a gun at them. Once the fear of being shot sets in, the people freeze, follow instructions ect. He could have used a ruse too, like BTK did when he ordered the family members to tie each other up in the basement under the pretense that it was just going to be a robbery.
The other thing to think about is the mental state of the perp. Some are compulsive, probably suffer from wishful thinking and take incredible risks to carry out there crimes. Look at the Faye Swetlick case. The poor girl vanished from her own neighborhood and somehow missed being seen by all the neighbors and any security cameras.