Police will call on experts to help determine whether the static line used for a cadet parachute drill on Monday was properly installed and of good standard.
Two police cadets were killed during the drill because of problems with the static line.
A fact-finding committee, headed by an inspector-general of the National Police Office, is looking into the case.
National Police Commissioner General Adul Saengsingkaew said he had demanded that the investigation come to a conclusion as fast as possible.
In response to reports that the parents of one of the |dead cadets suspect that their son's conflict with a senior |student might have been involved in his fatal plunge, Adul said he understood the parents' feelings and thus would ensure that the fact-finding committee address this suspicion too.