I have a feeling it might be both of them. The killings are very close together to be just one person and if it is just one, then he is a sick sick man to kill so many in such as short space.. One good thing, the killings have stopped (or at least they haven't found anymore bodies) and at least the parents/friends of these girls can lay the bodies to rest. Plus I noticed that there is 2 different styles of killing, 2 girls were stranged or choked, the other are been sent for toxicology reports..