PORTLAND, Ore. -- The investigation into the disappearance of Kyron Horman will be getting a boost from the FBI, which is dedicating up to six agents to help a sheriff's office task force.

Multnomah County Sheriff Dan Staton updated county commissioners on the case this morning and said the investigation is "moving forward" and "continuing strongly," Fox12Oregon reports.

The team of investigators assigned to the case includes an expert in information technology and a communications technology expert hired out of California to look over cell phone and cell tower data. There is also a behavioral psychologist helping in the case, Staton said.

Multnomah County Chief Deputy Jason Gates says the FBI has been a partner in the investigation "since day one."

Kyron has been missing since June 4, 2010, when he was seen at a morning science fair at Skyline Elementary School. Since that time, the sheriff's office has investigated more than 4,300 leads. So far, the case has cost the county $1.4 million.

Search teams scoured the areas between his home and school for days after Kyron's disappearance. They've also made numerous trips to Sauvie Island to search the murky waters.

Last month, they also searched two specific locations in the area of Skyline and Rocky Point roads, plus a gravel road in the Dixie Mountain area.

Click here for more on this story from Fox12Oregon.