the hairdresser said allison wasnt wearing walking clothes when she had her hair done, so if thats true she must have made it home after the appt. im guessing she went home and ran a relaxing bath, with maybe a glass or two of wine, giving an ideal oppertunity to be strangled in the bath, then i believe she was dressed in her easy to pull on walking clothes and driven to kholo creek bridge and rolled or dragged up under the bridge.
i dont understand why nbc would need to be involved, you would think the killer would be strong enough to carry a body, the adrenalin would be pretty high at that point, but who knows?
also maybe nbc was catching a bus or taxi home after drinking?
my opinions only