I was thinking that the killer may have come from South Africa or Zimbabwe or that his parents are from there as well.
His name is definitely not your typical American name and also photos of his wearing pro aparthied and pro Rhodesian patches suggest he or his parents are from South Africa or Zimbabwe (Rhodesia).
English: variant of Rolfe.German: from Ruffo, a short form of a personal name formed with hrod ‘renown’, ‘victory’.Probably an Americanized spelling of German Ruf(f).
http://www.ancestry.com/name-origin?surname=roof