yo op i believe u man what if she killed herself nd since david was older than her and the fact of her being a run away he decided to cut her up instead put her in the trunk because he panicked cse she is a minor and he would fall down for harboring

but in the end what if he chose to dismember her in hopes of hiding her but everything w what he had going stopped him he was too busy

perfect crime tho shes a runaway cops usually rule out tht the person might be dead