I just think he did it himself.
Float this (maybe someone has already posted this)
KB baked those rolls for PF. Got a recipe from her mom in the morning. Went to Safeway to get the things she needed to prepare dinner for the "family". PF gets to KB's they talk, KB puts the baby down for a nap. He does the deed. He's got a suitcase in the back of the pick-up under a tarp. Get's the suitcase, packs her in, wheels her out and puts the suitcase in the back and puts the tarp over it. Starts his cleaning job. Baby wakes up, most of the mess is already wiped up and in bags. If he's not quite done, he corrals the baby with some toys and keeps on cleaning. Cinnamon rolls remain on the stove. Finishes the cleaning, takes the baby to the truck runs back quickly for the trash and "Bob's your uncle" as a good friend used to say. Takes her to the ranch. Maybe that's why the dogs picked up a scent there. Leaves baby with mom, tells her he's going for a few beer, gets rid of her.
I could go on, but you get my drift
It's just a theory like all the others. However, in this one, I have KB closer to home.
edit for spelling