And how many of these kidnapping and ransom by gangs occur without police involvement ?

Hong Kong suspect hunted in Thai kidnap of Chinese tourist
24 May 2018
A Chinese tourist flying to Thailand from Hong Kong was set free 14 days after she was abducted at the Bangkok airport by a gang that included an immigration cop.

Chen Jincai’s husband called police after he paid a ransom of 2 million yuan (HK$2.46 million) and was told to pay another 1 million yuan.

Thai police sought arrest warrants for four Chinese suspects – Hong Kong man Song Ming and mainlanders Sun Wenqui, Kai Meiling and Sun Dongliang. Thai woman Wansikan Termthanapat, is in custody and police are hunting 10 other Thais believed involved in the kidnapping.

Chen, 39, arrived in Thailand at around 9.30pm on May 6 on a flight from Hong Kong, the Bangkok Post reported.

She was abducted by five people upon arrival at Suvarnabhumi airport, said tourist police bureau deputy commissioner Major General Surachet Hakpan.

Her husband, a Tanzanian citizen of Korean origin, paid a ransom of 2 million yuan but was told it was not enough. So he sought the help of police on Friday.
https://pattayaone.news/en/hong-kong-su ... e-tourist/