Criminal profile of "the murderer" compared to the author of the ransom note.

[blackcatsarecool]

is there a criminal profile of either?

 

[Tadpole12]

Good Morning America's tweet - "Former FBI profiler John Douglas weighs in on the strategy of Delphi police as they search for the murderer of Abby Williams and Libby German. " - Trendsmap

JD, LG AW case re: familiarity / comfort zone / risk factor:

"And for an age group,
I usually start off at about mid, mid twenties to late twenties.
I've seen that the Bureau came out with a range..
It's way too, way too long, from 18 years of age to 40 years of age
as a, as a potential suspect.
I start in the mid twenties and
I'll either tack on years or eliminate years based upon either
the sophistication of the crime or the lack of,
sophistication, you know, of the crime."

Wondering how JD would apply his methodology to the JBR case.