Billie "Bob" and Mary Lou Black

Billie and his wife Mary disappeared from Atchison, Kansas at 8:15 a.m. on September 11, 2009. They were last seen in their light blue 4-door 1990 Honda Civic with the Kansas license plates. Billie "Bob" Black is 6', 190 pounds, with grey hair and brown eyes. Billie suffers from diabetes and left his insulin at home. Mary Black is 5'1" and weighs 115 pounds, with grey hair and brown eyes. Mary is suffering from Alzheimer's disease. She may not recall her identity.

Billie and Mary have one son together. Billie, who was stressed from having to care for Mary, told their son it would be better for him if his parents weren't around. It's been stated by authorities that there have been several possible sightings of them, but they have been discounted. Their car has never been located. One theory is that they drove, accidentally or intentionally, into the Missouri River, but there is no evidence to this theory. Authorities and members of the Blacks' families believe they're no longer alive.

http://www.charleyproject.org/cases/b/black_billie.html
http://www.charleyproject.org/cases/b/black_mary.html