William Myers was a Human male and a resident of Detroit in 2004, living in the second floor of his house. He had a blood type of either B− or AB+.

That year, he donated blood to the blood bank where Loomis worked. When Loomis looked through the bank's files to search people with the blood types he hadn't yet delivered to Damron, he thought about Myers as a suitable person. (ENT: "Carpenter Street")