'The last known footage of Charlotte Emily alive shows her walking away from the building and towards the light of a car. Due to the weather that night, the vehicle and its owner remain unidentified. Police believe it belongs to someone Charlotte knew.'
Charlie's death is neat to think about because to me it was the most impulsive and unplanned one, I like to imagine William used a lug wrench he had in the glove compartment of his car. Because it kinda emphasizes the fact it wasn't planned, he only had the wrench in the car in case he ever needed to change his tire.