I wanted to introduce a topic here that I don't know if we've discussed. Is anyone familiar with the concept of solvability factors and how they are used during a preliminary crime investigation?
I copied this list from a police procedure manual that you can find through a Google search. The 12 solvability factors are:
Solvability factors include witnesses to the crime, knowledge of a suspect's name, knowledge of where a suspect can be located, description of a suspect, identification of a suspect, property with identifiable characteristics, a significant modus operandi, significant physical evidence, description of suspect's vehicle, positive results from a crime-scene evidence search, and belief that a crime may be solved with publicity or reasonable additional investigative effort.
Both the DA and members of LE have since expressed that in the early days of the investigation, they thought the case would be solved in a matter of days or weeks. So I'm wondering which of these solvability factors they were basing that on, and then where things got stalled. IMO at the least they had what they thought was significant physical crime scene evidence.
I remember when I first heard that there was a video and an audio clip. I actually felt relief because I believed there was no way BG could escape with that much "evidence" out there. At the risk of sounding like a broken record, it's really worthwhile to understanding cases like Delphi if you can read a summary of the Child Abduction Murder Study by Brown and Keppel. This study found that physical evidence from the crime scene did not increase a case's solvability by very much at all! This shocked me. The biggest factor in case solvability was establishing if there was a prior relationship between the victim and the murderer. And if one didn't exist (it was a "stranger abduction"), solvability remained very, very low in spite of good forensic evidence in the firm of hair, fibers, DNA, etc.