Not sure if someone has seen the recent updates, but I heard they started finding socks filled with human bones on the Taal Lake, and they are now doing DNA testing to determine whether the bones are from the victims. Also, I saw a clip where two suspects of the crime are helping the authorities locate where they threw the bodies of the victims.
But I dont see how relevant this is to gambling. More of an organized crime.
The reason for their death is because of gambling, and looking at it from that point of view, it does make it relevant to gambling.