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New developments involving missing siblings from Idaho. Their mother, but not the children, has been found by authorities in Hawaii.

New developments involving missing siblings from Idaho. Their mother, but not the children, has been found by authorities in Hawaii.

Now, it's been five months since JJ was last seen.

Now, it's been five months since JJ was last seen.

Now, it's been five months since JJ was last seen.

Those charges are eventually dropped. But a few days later, after Lori's arrest, ABC News correspondent Marcus Moore tracks Chad down.

Those charges are eventually dropped. But a few days later, after Lori's arrest, ABC News correspondent Marcus Moore tracks Chad down.

Those charges are eventually dropped. But a few days later, after Lori's arrest, ABC News correspondent Marcus Moore tracks Chad down.

Authorities continue their search for the children. They discover that the day Tylee was last seen, Lori's brother Alex's phone pinged first at Lori's apartment, then on Chad's property. And the cell phone data tells them more about JJ's disappearance. Alex's cell phone once again pings in Chad Daybell's backyard.

Authorities continue their search for the children. They discover that the day Tylee was last seen, Lori's brother Alex's phone pinged first at Lori's apartment, then on Chad's property. And the cell phone data tells them more about JJ's disappearance. Alex's cell phone once again pings in Chad Daybell's backyard.

Authorities continue their search for the children. They discover that the day Tylee was last seen, Lori's brother Alex's phone pinged first at Lori's apartment, then on Chad's property. And the cell phone data tells them more about JJ's disappearance. Alex's cell phone once again pings in Chad Daybell's backyard.

The FBI gridded off areas, and then they started peeling away the layers.

The FBI gridded off areas, and then they started peeling away the layers.

The FBI gridded off areas, and then they started peeling away the layers.

One of the investigators recognizes the hair and thinks it may well be JJ.

One of the investigators recognizes the hair and thinks it may well be JJ.

One of the investigators recognizes the hair and thinks it may well be JJ.

They say the body is wearing red pajamas.

They say the body is wearing red pajamas.

They say the body is wearing red pajamas.