That's a really great idea IMO. I've had so many opions since July, but I always come back to thinking it has something to do withy when Lyric was late with the other cousin or an adult became interested in one of the girls through church, school, or extra curricular activities. Taking both girls was either unplanned or a bonus in IMO. When there is an arrest I think everyone may be very surprised with the suspect. This may be an "oh they would never do that kind of deal" & so nobody would suspect them even if they did have a relationship with one of the girls.
I wish we had more information about the day Lyric and her other cousin went missing. Like who did they talk to that day at the lake and how long did they stay. Some posts have suggested that if by chance, the girls had asked for directions that day, that it was not possible for them to have driven their on their own. But Lyric had been there before with another cousin, going there from a different direction.