NAKHON PATHOM - Their son, Chayakorn Phutchaiyong, and another police cadet plunged to their deaths on Monday after a static line on their training aircraft snapped and failed to automatically open their parachutes.
Royal Police Cadet Academy commander Lt Gen Sakda Techakriangkrai said yesterday he had already set up a fact-finding committee.
"We will find out what happened and determine if anyone should be held responsible," he said.
According to Sakda, Chayakorn's parents were not convinced the static-line problems were an accident partly because their son had been engaged in a "serious conflict" with a senior.
The conflict was so serious that the school punished the senior with the maximum of penalty points - a punishment serious enough to force him to repeat a class.
"So, the parents wondered if someone would want to have their son killed in retaliation," Sakda added.
He said his school presented all its cadets and honour guards for the funerals of the two victims.
"We have tried to get them posthumous promotions too," Sakda said.
Meanwhile, police plan to interrogate the parachute instructor as they seek to |determine the cause of the accident.