So are you thinking this is a serial killer, then? That is the manual your statistics come from. Not arguing, just asking.
I think that it is either a serial killer, or a serial killer in the making, meaning this is his first kill, and will continue to kill if not stopped.
But what is more important is I think LE thinks so too. I am basing it on this..
There are a limited amount of criteria where the FBI gets involved in a crime, according to the link that I posted. When I looked at the different reasons,only one stood out that would apply here, and that is serial murder. It's not art theft, or bank robbery, and I doubt she was a gang member etc.Then I combined that choice with the stats for no other reason than to assume he is a serial killer, along with the very little clues that we have.
1) We do know that her body was left in the open, and not buried, and the majority of serial killers do not conceal the body. which leads to the next stat.
2) We know the body was found within 24 hours.In murders involving a serial killer, the majority of bodies are found within 24 hours.
3) We do not know the COD because LE has not released that. MSM has said that the COD was strangulation. My opinion only is to believe that, because as LE did say, she fought very hard. I know there are many reasons to fight very hard, but when a person is being strangled, the fear of losing air will make you fight like you have never fought before. (Same case as KV, and we do know she was strangled) The number one method of killing a serial killer uses is strangulation.
4)Serial killers pick a spot that is comfortable for them to kill. There was a detective interviewed on the news that seemed to think that one reason he picked that spot was because he was comfortable and could see traffic coming for a distance either way. Looking back I wonder if he was thinking this was the work of a serial killer/future serial killer too.
5) As I posted in a previous post, there's a professor of criminal justice that teaches in Boston. When asked by news media if the killer would be caught, without hesitation he replied "Yes when he kills again" He must think it is a serial/future serial killer, one would think.
6) Not released by LE, but by the news, she was sexually assaulted. 81% of serial killers use this as the motive.
Again, I can't say for sure that it is a serial killer, but if it is, this is a text book case.
If it's not, then maybe someone can answer the original thought. What reason would/could the FBI be called in to join the investigation, based on the reasons why they join?
Just to add, Roseofangels has made some great points in regards to the Macdonald Triad.