The Oklahoma State Bureau of Investigation is offering up to $5,000 for information concerning the death of a rural Grove man found dead on January 12, 2012.
The OSBI says Phillip Porter's body was found inside his home in the 24000 block of South 590 Road.
The state Medical Examiner's Office determined Porter died of multiple sharp force wounds.
The OSBI says it has conducted a number of interviews in the case, but needs the public's help to solve it.
Anyone with information about who killed Phillip Porter can call the OSBI hotline at 800-522-8017.