well to put a clear perspective on this... the only way it can be properly identified as "serial" is if there are SEVERAL factors involving the ways in which the crime had been committed...
has the same dna (from the killer) been found on all of these bodies, or the method in which their lives were terminated???
or is it just a coincidence that out of the 15-20,000 or so murders a year in the us how many of them were... blond, caucasian women under 5'6", etc...
if these factors line up and start to form a clear picture that some terrible person is "targeting" their victims... then and only then can there really be something to it...
if not... then it is just a bad set of circumstances that have happened to these women and regardless of serial killer or not... whatever happened to them is fucking awful regardless...
and this is really where the money should go to in law enforcement where they concentrate on shit like this and really focus on removing the violent murderers, rapists, etc... and keep them locked up and prevent them from harming others...
versus... well... we all know how much money and effort goes into the so called bullshit "drug war"...