In the process of investigation, hundreds of people will be identified and interviewed. Some will become witnesses, and most will be discarded as non-essential. Chances are none will become suspects.
KB was last seen at the Safeway on Highway 24 in Woodland Park. Using daily traffic figures from the November 2015 Woodland Park Traffic Study, an average of 30 vehicles passed just during the three minutes or so that she took to get out of her car and into the store. In the half hour that she may have been there, about 600 vehicles passed by, of which about 200 were local, and 400 were just driving straight through to the east, or straight through to the west.
LE has said that PF was the last person to see her, and the neighbor has pinned that time as a half hour later. So, another 400 vehicles passed through town. If you are followingf the total here, one person in 1,000 vehicles stood the best chance of transporting the phone to Gooding Idaho. LE has already ruled out PF as the phone transporter, so that knocks it down to one person in 999 vehicles. All LE has to do to break this case is identify all 999 vehicles and track down one that was in Gooding three days later.
When the FBI receives a tip, they do what is called a "referal/consult". Either by phone or in person, they do a basic interview of the tipster(s) information, log it, and pass it on to the