WINFIELD – (AP) Investigators looking into the two-year-old disappearance of a south-central Kansas man are hoping for a break with the discovery of human remains in Oklahoma.

Seventy-seven-year-old Winfield resident Richard May vanished in December 2009 after leaving the home of a friend in Pawhuska, Okla., for the 55-mile drive home. Ranch hands found May’s minivan three months later in Oklahoma’s Tallgrass Prairie Preserve, near
Pawhuska.

KAKE-TV reports that two ranchers recently found human remains while driving across the preserve. Authorities are trying to identify the bones, which a preliminary
exam determined are those of an older man.

One theory has been that May left his van and died after it broke down. But Winfield Police Chief Danny Parker says his department is investigating the possibility of something other than
a natural death.