http://www.police.gov.kh/archives/36612 (Graphic Warning!)

An Australian national died of a heart attack in a hotel.

Battambang

On August 30 2016 at 2PM a foreigner died at Khemara Battambang 1 Hotel which is located in village, sangkat Chomkar Chomrong, Battambang city, Battambang province.

According to the Municipal Police:
The victim was identified as 71YO Australian COLESS​ GEOFFREY​ MALCOLM​. He died on the floor of Room No241 in Khemara Battambang 1 Hotel.

According to a male co-traveller identified as 34YO Seng Hong:
The victim worked for the agricultural department of iDE (helping to promote/advertise communities in Cambodia) in Siem Reap province. He travelled to Battambang on August 29 2016 to attend a seminar at/with the University of Battambang.
On August 30 2016 the victim had lunch; afterwards he relaxed till 1PM. His co-traveller went to call him but didn’t hear a reply so he called the hotel manager to open the door. They entered (the victim’s room) and found the victim lying dead on the floor.

After the participation of the Royal Prosecutor and after a doctor performed an examination and biopsy the police concluded that the victim died of a ‘personal’ disease/illness. (heart attack)

More here: http://www.koonkhmer.com/forum/viewtopic.php?f=5&t=2054