From American Prosecutors Research Institute:
Regarding "stereotypical kidnapping" (non-family member resulting in murder)
In 80% of the cases, the initial contact site is within 1/4 mile of the victim's last known location. Conduct a thorough neighborhood and vehicle canvass and search of the area of last sighting to locate the initial contact point.16 Witness sightings, items belonging to the child or physical evidence of scuffle may point to the initial contact point.
Once the initial contact point has been discerned, the search needs to be expanded to more than a 1/4 mile radius, as the likelihood is greatest that the child will be located at a distance of more than 1/4 mile from the point of initial contact.17 The kidnapper will usually want to take the child from the immediate vicinity to a more secure location.
Interview everyone who was at or near the scene of initial contact. Based on the Department of Justice study, the abductor is usually (66%) at the initial contact site for a legitimate reason
. As the abductor often lived in the area (29%), a thorough, separate interview of all those who live in the neighborhood is essential. Merely taking one household member's work for the whereabouts of another is not acceptable. Alternatively, the abductor may have been engaged in some normal activity immediately prior to the kidnapping and been noticed by someone in the area. Within a week of the investigation beginning, the abductor's name is known to the police in 74% of the cases.
As they question neighbors, police should ask "What did you see that was unusual?" and "What did you see that was usual?"
since the study found that, in two-thirds of the cases, the killer was in the area because he belonged there
. Someone at CA's has seen something...they just don't realize it. They may have thought it was "normal or usual" to see it/them.
Other interesting stats:
Commonly, the killers had a legitimate reason to be at the site where they first contacted their child victims. Twenty-nine percent lived near the site, 19 percent were there for some normal social activity, and 18 percent either worked in the area or were there for some other business.
The most common device used in attempted kidnappings was inviting a child to get into a car.11 Other lures that are commonly used involve requests for assistance, invitations to see pets or requests to help look for them, claiming that an emergency has happened, name recognition of the victim, an authority figure (such as a police officer or firefighter) telling the child to accompany him/her, and computer solicitation for meetings.
Compile a list of known sex offenders in the region. Thirty-one per cent of the abductor/murderers had prior histories of raping children, while forty-five percent had previously committed other sexual assaults against children.Consider contacting the media, in accordance with previously established protocols.21 The media is five times more likely to help an investigation than to hinder it, as it improves the likelihood of obtaining witnesses.22 The media may also assist in drawing out larger numbers of neighbors and concerned citizens to assist in the initial search. Maintain media coverage throughout the entire case and consider a broadcast re-enactment of the events immediately before the kidnapping to solicit potential witnesses.If the investigation has become stalled, review the entire investigation. Reinterview key individuals, those contacted during the initial neighborhood canvass, and then expand the interviews to include people who were at work in the area at the time of the kidnapping (e.g. delivery personnel, employees of gas, water, electric and cable companies, taxi drivers, post office personnel, garbage handlers). Utilize rewards and crimestopper programs.http://www.ndaa.org/publications/newsletters/apri_update_vol_12_no_10_1999.html