A new search for evidence is planned in the Dylan Redwine case.
Dylan was 13 when he disappeared on a court-ordered visit with his father near Durango during Thanksgiving week in 2012. Some of the boy's remains were found in June 2013, north of his father's home.
In August 2015, the La Plata County Sheriff's Office told Denver7 that Dylan's father, Mark Redwine, was officially a person of interest in Dylan's death.
The new search for evidence is planned for July 6-11 near the top of Middle Mountain Road.
Middle Mountain Road, north of Vallecito Reservoir, is near where investigators discovered Dylan's remains.
La Plata Sheriff's Office spokesman Dan Bender told Denver7 that searches have been conducted every summer since Dylan went missing.
"This summer is no different," Bender said.
Bender said erosion can cause things that are covered to become uncovered over the year.
Sheriff's investigators have searched Mark Redwine's home at least twice and he has taken a polygraph test with law enforcement. While he is a person of interest, authorities have never called Mark Redwine a suspect. He has never been arrested or charged.
Read previous coverage of Redwine investigation.