IMO, the biggest factor is vulnerability. He was able to use them. He may not have used drugs/alcohol at the time but may have been a prior abuser.
I had this thought that possibly he was a former abuser that contracted Hep C or something and blamed the illness on others that he had prior contact with. This is obviously a sociopath and this is a getting back.
Jennings is so small that there has to be a link. AA comes to mind. I would check the Lafayette, Crowley, Welch,Lake Charles,Sulfur or any towns with AA meetings and/or a disgruntled member. Or a vocal member....one that has issues that are not easily explained. I think what I am saying is that the people are targeted for their lifestyle or their substance abuse which may have been thwarted in the killer.
Was wondering more along the lines as to whether a victim's race could be a factor in method of killing.......
Going by the basic death info listed for the first 5 women...
With the 3 women of the white race it indicates that no official cause of death has been determined, but high levels of alcohol and drugs were found.
With the 2 women of the black race it indicates a slit throat as cause of death. (there is no mention of alcohol and drugs) One woman with slit throat was found shortly after death but the other with slit throat was badly decomposed.....took two different dna tests before identity established. This tends to make me think that state of decomposure didn't disallow a finding of a slit throat being cause of death.
So it seems that either LE is picking and choosing whom they release info on....(would hope that wouldn't be racially based though)...or if a serial killer...he's got two ways of killing dependent on race.
I also think it is an older man....(believe it was you posted that in other thread)
am one finger typing as hands are bad...so forgive mistakes please