Answer:
Short answer is, it's because of the chaos caused by war on drugs.
Explanation:
As the saying, your innocent until proven guilty. The way your question goes, you already assume that's what happening but nobody has evidence of that yet.
So here is what i think of it, we can probably assume that it is extra judicial killing or it may not be. It could also be people related to drug proliferation starts killing anybody who they suspect will talk or point at them so before they get named, they start getting rid of them.
source. internet
