rbbm
Your statements are a little misleading and for the benefit of readers not familiar with the sourced paper I'd like to clarify a couple of things as it's my goto reference on child abduction murders and I'm familiar with it.
The study is an analysis of data collected from 735 cases of child abduction murders. Its purpose was to provide LE and SAR teams with historical information in order to help them optimize their procedures when a child goes missing. While the analysis wasn't specifically intended to profile per se, the authors found there were distinct differences between child abduction murders and child murders.
Common sense says the longer the delay in reporting a child missing means it's more likely the child will be murdered, and the data from these actual cases bears that out. To say that a two-hour delay in reporting is usual shouldn't be interpreted to mean that it's expected or in any way exonerates the caregiver. Instead it emphasizes the importance of calling 911 immediately.
From the study:
“Fast action is necessary since there is typically over a two-hour delay in making the initial missing child report, and the vast majority of the abducted children
who are murdered are dead within three hours of the abduction.”
It goes on to say:
“We need to tell parents that if their child is unaccounted for,
call the police immediately.”
In Bella's case there was a delay and that delay was deliberately caused by her own mother and stepfather.
Furthermore, that 22% of the murderers abused drugs is statistically significant and must be included as a risk factor when considering potential abductors. Even the possibility that Bella's mother and stepfather somehow concluded that JR was not a risk to Bella does not diminish their culpability by omission.
Their role in finding Bella was not to distinguish between good guys and bad guys, it was to provide LE and the search team with any and all names of people who had been in recent contact with Bella. It's unforgivable that they put their personal needs and fears before their concern for their child's life. I would even say it was criminal.
http://www.atg.wa.gov/uploadedFiles...)/Child_Abduction_Murder_Research/CMIIPDF.pdf