The presence of LP Senator Bam Aquino in Marawi City a few days before the Maute siege

Bam Aquino

Occam's Razor, the philosophical principle which states that the simplest explanation is probably the most correct, is very likely in play here. That, and the axiom of "Cui bono," which postulates that whoever stands to benefit the most from a crime is at the head of the line in the search for its perpetrators.