Police were also investigating if somebody had ordered the killing, and if the motive was personal or work related.
The National Union of Journalists of the Philippines said his colleagues in Digos described Oliverio as being vocal on local politics and against the proliferation of illegal gambling and illegal drugs in the city.[]
Oliverio, 57, was an employee of the city government who served as anchor of a blocktime radio program at Radyo Ukay-UMBN. But Radyo Ukay station manager Ramon Sibya was quoted in a Philippine Information Agency-XI report as saying Oliverio was no longer anchoring the radio program due to health reasons.
