According to an affidavit submitted by a national agency in court, Kochi, the NIA is looking into the activities of a health club in Kerala that was founded by the accused in the case of alleged organ trafficking to Iran. Madhu Jayakumar of Vattathipadam, Palarivattom, and three other accused were collecting money through an account in the name of Stemma Club maintained with South Indian Bank, according to an affidavit filed by the National Investigation Agency seeking custody of the prime accused in a trafficking case. The NIA court's order granting custody stated as much.
On November 7, Jayakumar, who had been residing in Iran, was taken into custody. From November 12 to November 19, the NIA court gave the anti-terror agency custody of him.

According to the affidavit used in the court order, trafficked individuals were coerced into donating their kidneys in situations when their lives were in danger. "Thereby, all the accused extorted huge sums of money and amassed illegal wealth in the form of money, crypto assets and landed properties, and thus they committed the offence pursuant to their criminal conspiracy," according to the NIA affidavit. According to NIA sources, the network charged up to ₹50 lakh each transplant, and the majority of organ donors were from Telangana, Karnataka, and Andhra Pradesh, while organ patients came from several North Indian states.

According to the NIA document that the court referred, Jayakumar was the mastermind behind the global organ trade. Sources claim that Jayakumar operated the Stemma Club, a fitness club in Kochi, with the help of co-accused Sabith Nasar of Thrissur and Sajith Shyam of Kalamassery, who were also taken into custody. According to sources, the account is linked to the accused's other holdings and was used to transfer money obtained from the organ trade in Iran. They stated that the NIA had tracked ₹6 crore worth of transactions in a Sabith bank account.
Sabith was detained by immigration officers at Kochi airport on May 18, 2024, on suspicion of being a member of an organized organ trafficking network.

Sajith and Bellankonda Ram Prasad, a native of Vijayawada, were later taken into custody following a police investigation. According to officials, Jayakumar's arrest aided the NIA in discovering the network's activities in Iran as well as information regarding the number of individuals who had organ transplants performed overseas.