The 29-year-old woman was also found to have no valid documents to be in Malaysia.
He said battling the waves left him as exhausted as "running a marathon".
The café has been shuttered for two months.
The owner's wife switched off the aircon as it had been running for more than eight hours.
The victim had already passed away by the time rescue personnel managed to extricate him from under the vehicle.
They were allegedly paid between S$500 and S$1,700 to register up to 480 SIM cards.
The stolen Rolex had been purchased for more than S$50,000 and was already marked down.
A local official said he slid 100m to 200m before landing on rocky terrain.
All 26 workers inside the hangar at the time of the fire evacuated safely.
He shot his mother and siblings as they were sleeping.