Complex sentence: JK intensifies his investigation and suspects that ACP Tirisangu's office has some moles who are involved in this case, since all the crimes had happened in Tirisangu's Jurisdiction.
Split into simpler sentences: JK intensifies his investigation and suspects that ACP Tirisangu's office has some moles who are involved in this case. JK suspects so because all the crimes had happened in Tirisangu's Jurisdiction.