I guess that case will not easy to solved because there will be a power behind that case that will hide the clues. If that is related to the corrupt police men or government officials, they will not allow the investigation and will force them to stop the case.

We don't know who is right or wrong and can only pray and hope that the suspect will get arrested. Besides that, we hope that the clean police and government can follow the case until it solve and no one will be the victims.

Perhaps, the crime suspects kill those people because they cheat  and caught by the suspects. They want to clear the evidence so police can not investigate it.