Thai police said Wednesday that a DNA sample provided by a Japanese businessman suspected of siring 12 surrogate babies in Thailand matches with all 12 infants, proving he is their biological father.

A Thai representative of the 24-year-old businessman provided the DNA sample on Monday to be used for the paternity test. The sample was collected in Japan — witnessed and approved by Japanese officials and other relevant parties — before being delivered to the Lad Prao police station in northeastern Bangkok, he said Monday.

According to his representatives, the man fathered the children in order to "hand down assets" and because he is "capable of raising children," but Thai police suspect he may be engaged in human trafficking. The police have requested that the man, who is currently not in Thailand, appear for questioning, but he has yet to do so.

Besides the 12 babies, he is also suspected of fathering another three surrogate babies born in Thailand. DNA tests earlier conducted on the 12 babies show that all were fathered by the same man. The remaining three, and a separate boy with a Japanese passport who may or may not be a surrogate child, are currently in Cambodia.