I have considered whether WC knew more about SE than we have been told. Did he know she lived alone? Did he know how much further her walk home would be?
Obviously he was taking the biggest risk in kidnapping SE, but how could he be sure she wasn’t 1 min from her house and had just put the phone down to her bf saying I’ll be back in one minute, then the alarm would have been raised within the hour- it’s as if WC knew he was going to have a bit of time before the alarm was raised. Could just be a coincidence but she is of age to have husband and kids back at home who would have raised alarm immediately. JMO- keen to hear others thoughts
I don't think he showed enough foresight in any other aspect of this crime for us to assume he would about her being reported missing and when. This clearly wasn't meticulously planned by a criminal mastermind intent to cover his tracks.