Back to the diaper (if it is a diaper...). I think he knew she was going to need one, and I hate to type out why but here goes: either from bleeding or incontinence after an assault, or from incontinence from when someone dies and their body releases all fluids, etc. I can't believe I just wrote that... But I think he knew that when he left he needed a way to contain her bodily fluids for some reason.
If it's true that her body was dumped so close to the hotel, then it's possible that he took her there to kill her: privacy, as well as minimizing her DNA in his vehicle. Or she may have died during "whatever", he caught wind of the 911 call, and knew he needed to unload her ASAP.
I feel sick in my stomach. What monsters. :furious: