I've seen several media reports (and of course online sources) promoting lists or linked cases.

I've only done a crude media search so far, but the only credibly sourced official listing/reporting I've seen was in 1985 when the FBI and several states convened regarding these cases. They've mentioned some commonalities, but as we all know there tend to be inclusion/exclusion criteria that are not necessarily made public (sometimes based on info not available to the public). The ones I've been able to determine:

--red or strawberry blond hair, natural or dyed/highlighted

--cause of death tends to be, but does not seem exclusive to, strangling or asphyxiation

--bodies dumped near interstates/highways

--years 1978-1985 (at the time, now I see up to 1992--?)

--most seem to be hitchhikers, some possibly sex workers

--certain states in the Bible Belt, centered around Tennessee

Q1. Can anyone confirm these parameters/criteria? Am I missing any?

Old reports mentioned a vic in Pennsylvania*, but this seems to now be excluded. At this time it appears that the most likely cases are in Tennessee*, Arkansas*, and Mississippi*; likely Georgia; possibly Kentucky*; somewhat possibly in West Virginia; and others suggested in North Carolina, Ohio, and Missouri.

[Note the * indicates what the 1985 task force mentioned; Georgia (Rising Fawn) happened after that. The "most likely" "likely" "possibly" "somewhat possibly" and "others" probability estimations are just my opinion.]

Q2. Are there any other suspected locations I'm missing or specific reasons to expect bodies outside of the Bible Belt (except, of course, people go places, esp. if it's a trucker)?

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I'm trying to refine some parameters for searching, so any thoughts are welcome.