Complex sentence: During Makishima's infiltration, Kagari finds out the true form of Sybil system when he is assigned to track one of Makishima's men, and thus, is killed to keep the secret by the chief using Destroy-Decompose Dominator, erasing all traces of him.
Split into simpler sentences: During Makishima's infiltration, Kagari finds out the true form of Sybil system when he is assigned to track one of Makishima's men. He is killed to keep the secret by the chief using Destroy-Decompose Dominator, erasing all traces of him.