More Sightings of Suspected Kidnapper

This morning, more sightings and more concern about the fate of 16 year old Hannah Anderson in the hands of her alleged abductor James DiMaggio, CNN's Miguel Marquez reports.

There have been dozens of sightings of the dark blue Nissan Versa outside of California, with Amber alerts now lighting up much of the western US. At this Seattle emergency call center 9 out of 10 calls related to Hannah Anderson

Investigators are saying DiMaggio may have built his own explosives, ditching his car and wiring it to explode.

"If you see this car, do not approach it, but call law enforcement," says Jan Caldwell, San Diego County Sheriff's Department.

This as the human toll is taking it's effect. Sara and Ralph Britt – mother and step father of Christina Anderson and grandparents to Hannah and Ethan- spoke exclusively to CNN.

Sara and Ralph Britt/Victims' Parents and grandparents
"Please let Hanna go," says Sara.

"Let her come back," says Ralph.

They believe that Hannah is alive. They hold out hope 8-year-old Ethan is alive as well, but they fear the worst.