White tent at Guthrie's home used to create nighttime testing conditions, source says
From CNN's Josh Campbell
A white tent erected by federal agents at the home of Nancy Guthrie on Thursday was part of a testing procedure to create nighttime conditions similar to the time of day the 84-year-old went missing, a law enforcement source familiar told CNN.
Once FBI specialists set up the tent to create a blackout environment, replica clothing and a backpack similar to what the suspect was believed to be wearing were examined through the lens of what a doorbell camera might see at night, the source said.
The source said examiners looked at the reflections of lighting against the items to ensure they were confident in their brand names.
Also on Thursday, FBI examiners used specialized equipment to analyze the front of the home where the suspect was seen on video in order to determine his height, resulting in the FBI assessing him to be 5’9” to 5’10” tall.