In Oklahoma 3 bodies were found in 8 foot deep grave while workers were digging up a septic tank. The bodies were Wendy Camp, 23; her daughter Cynthia Britto, 6; and Lisa Kregear, 22. They had disappeared on May 29, 1992. Police have arrested the man, Grover J. Prewitt Jr,  who used to own the land they were found on and who sprinkled black pepper on the grave to kepp the smell down. Back in 1992 they hired a man to dig a hole for a septic tank but before they put it in, the woman went missing and the hole was filled without a tank. Police say that his mom was also involved with the murders and and helped him cover it up. She died in 2011.

  http://news.yahoo.com/arrest-made-okla-cold-case-dating-1992-000916482.html