BARRON COUNTY, Wis. (WBAY) - Investigators in the Jayme Closs disappearance went up in a helicopter Thursday to look for possible changes to an area that was searched last month.
Jayme Closs, 13, has been missing since Oct. 15. Investigators believe she was abducted after her parents, James and Denise, were shot and killed in their Barron home.
In October, thousands of volunteers searched miles of terrain looking for possible clues or evidence. On Thursday, a helicopter search took place to look for changes on the ground where volunteers searched. Officials say the search is not based on new tips.
An Amber Alert remains active for Jayme. She's also featured on the FBI's Kidnappings and Missing Person's website.
There's a $50,000 reward for information that leads directly to the location of Jayme Closs.
Barron County Sheriff Chris Fitzgerald has identified two vehicles of interest that were captured on home and business surveillance video near the Closs home around the time of the incident.
One vehicle is believed to be a 2008-2014 Dodge Challenger that's red or orange in color.
The second vehicle is black in color. The sheriff says it is believed to be either a 2006-2010 Ford Edge or a 2004-2010 Acura MDX.
People who have information on these vehicles or spot them are urged to take down the time, location and license plate and call the Jayme Closs tip line at 1-855-744-3879.
The gun used to shoot and kill James and Denise Closs has not been located.
911 dispatch logs show multiple shots were fired at the Closs home. The call was placed from Denise Closs's cellphone. Deputies arrived on scene to find the Closs parents dead of gunshot wounds and Jayme Closs missing.
Sheriff Fitzgerald says Jayme is not considered a suspect in the killings.
The FBI and Wisconsin Department of Justice Division of Criminal Investigation continue to assist Barron County with the investigation. Last week, the sheriff announced the the investigation had transitioned from a 24/7 operation to a "deliberate and methodical effort."