Well Duh. Girls who are neglected or abused are more likely to become sexually active and at an early age and thus more likely to become unwed mothers.
Girls who shack up with are more likely to suffer domestic violence and also be unwed mothers.
Girls who do drugs or binge drink are also more likely to be victims of sexual assault and other crimes and more likely to become unwed mothers (BC is hard to remember when you are strung out).
Correlation is not causation. That two things occur together does not mean one caused the other.
I think it is a blessing that most people haven’t had to learn to think like a predator. Indeed in this type of innocence of mind in the case of the motives of the predator is precious enough to mankind that throughout history viable cultures have outlawed “single motherhood”.
When such folly is outlawed, then most folks do not have to consider in harsh actuality of the mind of the predators of the vulnerable.
Unfortunately such innocence of mind is not permissible today. Why? Because our culture has come to condone, to support and even to celebrate “single motherhood”. Because of that you and I, all of us, must come to know the mind of the predators like the killer in this sad case.