watch 01:52 The Loop (TV) Do you like this video? This article is a stub. You can help Bones Wiki by expanding it. William Raymund 'Billy Rae' McKenna aka "Cement Head" is the murder victim in The Killer in the Concrete. Retrieved from "https://bones.fandom.com/wiki/William_Raymund_McKenna?oldid=40933" Categories: Deceased characters Article stubs Characters Criminals Murder Victims Season 2 characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.