It's not just his life but also his family's safety is included here. He's a guy that's been with Ang for a very long time and now that he's exposed him, he's really made Ang angry and that's why there's a bounty on him. Ang said that he's been treated like a brother to him and now he betrayed him. Very scary indeed and even the reporter, Emil Sumangil that interviewed the informant. His wife posted and asked for prayers for his safety as well.
Indeed he's life is totally in huge danger for exposing this anomalies that's why its not surprising to know if there's really a bounty for his head since he's hitting a big rock which is for long time hard to crack by anyone. So let see if they can see the bones of the affected gamblers in this case since if it happen that they locate all the bones then match it with DNA then this is huge case solve and this is huge achievement for investigating bodies for solving this long time issue.
There were bones that were found in the Taal lake and it's reported. I just watched the video[1] of the report but, they'll still need to test it if it belongs to the victims or if they're real human bones.
[1]
Sako ng mga buto, narekober sa gilid ng Taal Lake ng mga naghahanap sa missing sabungeros | 24 Oras or if translated "Sacks of bones, recovered in the side of Taal lake by the rescue team of the missing cockfight bettors.