See - sc.judiciary.gov.ph/jurisprudence/2012/october2012/196434.pdf
"x x x.
There is conspiracy when two or more persons come to an agreement
concerning the commission of a felony and decide to commit it. Actions
indicating close personal association and shared sentiment among the
accused can prove its presence. Proof that the perpetrators met beforehand and decided to commit the crime is not necessary as long as their acts manifest a common design and oneness of purpose.
x x x."
