The boys, aged between 11 and 16, and their 25-year old coach, went missing on Saturday while exploring Tham Luang cave complex that maze of passages and chambers is prone to flooding.
Mitsutoki Shigeta, 28, became the centre of a "baby factory" scandal in 2014 after Thai police said DNA samples linked him to nine infants found under the care of 24-hour nannies in a plush Bangkok apartment.
Police also arrested nine men in connection with an arms seizure, saying they had clear evidence the suspects and their extended network were aiming to cause unrest in Thailand.
Suspect behind deadly 2015 Bangkok bombing breaks down and says he's being tortured.
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