The parents of Michael and Rebecca Hargon appeared Wednesday morning on Good Morning America. Family members have passed out about 400 reward fliers covered with a recent family photo of Michael Hargon, 27, Rebecca Hargon, 29, and their four-year-old son, James.
The family is offering a $25,000 reward for the Hargons' safe return. Mississippi Crimestoppers is offering a $1,000 reward for information on the family, missing since Saturday.
The Sheriff's Department and Mississippi Highway Patrol are handling the investigation.
Blood found outside the family's house in Vaughan, Miss., is being tested by the Mississippi Crime Lab.
Yazoo County Sheriff James Williams says the blood was found outside the house and shell casings were found inside the home.