Investigators and Sheriff Jeff Box were out searching for any evidence in the Swift case until 4:30 a.m. on Thursday and reconvened later to go over the information they have.
"It's been another day of searching and recovering things that could be helpful later," said Box. "We've been collecting potential evidence all over the county."
He added they would perform a more intensified multi-agency search for Swift on Friday on both the ground and from the air.
Investigators are also focusing more attention on Swift's timeline before she disappeared and cell phone records. Box stated Swift's cell phone has not been located and when it is called it goes straight to voicemail. He also noted that cell phone records show her phone accessed the Internet sometime on Sunday morning.
"We are still conducting interviews with friends and family members and definitely trying to pinpoint her whereabouts," said Box.
Box is not ruling out foul play at this point in the investigation, but noted there has not been any evidence that would lead them to take the investigation in that direction.
Investigators are still awaiting the results from the TBI crime lab, which Swift's SUV was sent to earlier this week. Other pieces of potential evidence have been collected and Box said they could yield more information after being processed.
"We'll be looking for DNA and fingerprints on any of the items we recovered," said Box.
Swift, a 44-year-old mother of four was last seen early Sunday morning by her husband at their home on Willie Johnson Road after she reportedly returned from a Halloween party. Her white 2004 Nissan Murano was later found on Sunday on Millsfield Highway near the intersection of Harness Road with a flat tire.
Karen Johnson Swift is described as:
Height: 5' 5"
Weight 138 lbs.
Anyone who has had contact with Swift, recalls seeing anyone near her vehicle since her disappearance, or has information regarding her whereabouts is asked to contact the Dyer County Sheriff's Office at 731-285-2802.