Officers of the city police station conducted a manhunt operation against the suspect, who fled after the incident./PN Gemino added that the two had previous arguments as Siason’s wife is allegedly now the live-in partner of Treveles. According to Talisay City police chief Major Jigger Gemino over an interview with DYHB Bacolod, Siason was walking in the area when Treveles alighted from a vehicle and confronted the victim. BACOLOD City – A man was shot to death in Barangay Cabatangan, Talisay City, Negros Occidental. Treveles then shot Siason using an unknown firearm around 1:05 p.m. on June 15. The victim died on the spot. Police identified the suspect as Rolly Treveles, a resident of the village. The 55-year-old Ismael Siason sustained gunshot wounds on the chest, a police report showed.