The Tennessee Bureau of Investigation confirmed they have seized new evidence in the Shelley Mook case.
Shelley Mook, 24, disappeared nearly three years ago.
Mook was a beloved 8th grade teacher at Harris Middle School in Shelbyville. On February 28, 2011, investigators said she went to her ex-husband's home to drop off their 6-year-old daughter. Later that night her car was found in a field, just outside of Murfreesboro. Police said it had been set on fire.
Mook was never found and investigators suspect foul play.
Her ex-husband, Tyler Mook, is believed to be the last person to have seen her alive. The TBI searched his home but he was never arrested. He's still considered a person of interest.
On December 27, 2013, investigators with the TBI seized the van of Tyler's neighbor. They have confirmed they're processing it for any possible evidence. The circumstances which led to the seizure is not being released.
Over the years, many searches and vigils have been organized by family and friends.
The last one was in the fall of 2012 when the TBI received new leads and searched for her in a rural area near a set of railroad tracks in Franklin County.
Shelley's mom, who lives in Pennsylvania, now has custody of Shelley's daughter.
A $20,000 reward is being offered for information leading to Shelley's whereabouts.
Anyone with information is urged to call 1-800-TBI-FIND.