The tourist, Hassanai Channa, 25, died after he was hit by a friend following behind jumping from the cliff to the pond shortly after he jumped first.
Cliff jumping operator Chatkarin Trakul-inson said it was unexpected incident as normally there are six guards on the cliff and in the pond.
He said the victim came with friends in group.
The victim jumped off the cliff while his guard on the cliff did not notice and his friend jumped off at close range.
He assured that the cliff jumping at Chiang Mai Grand Canyon has enough safety standards and all tourists would be informed to strictly follow the safety rules in case they play the adventurous game.
Fifth Region Provincial Police deputy commander Pol Maj Gen Pacha Ratanaphan said forensic pathologists at Maharaja Nakorn Chiang Mai Hospital were conducting autopsy to find the exact cause of death whether it was from drowning or fatal broken neck.
If the death was caused by impact from the close range jump, then his friend will be charged.
He said the cliff jumping operator will also be charged if investigation showed the jumping was caused by reckless operation of the service.
Chiang Mai’s “grand canyon” in Hang Dong district is an old rock quarry covering a total area of 100 rai, about 30% of the space is water.
Also known as the Hang Dong Canyon, the Chiang Mai Grand Canyon is less than an hour drive from the center of Chiang Mai city.