Some parts of the Philippines have. to say the least, dodgy characters, Angeles having more than most. A former US Marine and contractor in Iraq has been arrested in the US following charges that he was involved in a double murder in the Philippines. Be careful who you get to know. http://allthingscrimeblog.com/murder-among-the-angels/
This is an odd case. They chose to do the killings themselves rather than hire a hit squad; this made them far more likely to be caught. To give your blood stained clothes and your guns to your housemaid to dispose of is somewhere far beyond merely "stupid". One wonders if they were themselves tanked up on "shabu"?