CNN.com reports in an article titled, “License plates found in missing girl case.” Excerpt:
Investigators looking for Elizabeth returned to her home Thursday with police dogs and questioned for a fifth time the younger sister who witnessed the abduction. They said they have used polygraph tests in their questioning of numerous people, including family members.
A law enforcement source told CNN the results of a lie-detector test on an extended family member were inconclusive. Asked about the implications, the source said, “You want to keep looking at the person.”
The source said police will see if the person has an alibi for the night Elizabeth disappeared.
All polygraph tests have been administered to males, including Ed Smart, the girl’s father, the source said.