english is not my mother tong so i have to say sorry for the bad spellin stuff, but could it be that randy some how infectit Datu with he's Zombie D N A just to help the guys?
I don't know why but somehow i think he is still in there wanting to help.
And he some how discovered that this should be the best way.
noing that infecting datu should give Michael a key to the markings or something :d.