Complex sentence: Remembering what Hang told him and not trusting anyone in the department Hoi does not even tell his supervisors about Hang's dying words instead he investigates on his own to try to find who Hang's five undercover agents are.
Split into simpler sentences: Remembering what Hang told him and not trusting anyone in the department, Hoi does not even tell his supervisors about Hang's dying words. Instead, he investigates on his own to try to find who Hang's five undercover agents are.