The Central Bureau of Investigation (CBI) on Saturday detained accused Brajesh Thakur's son after questioning him in connection with the Muzaffarpur shelter home case.
Earlier in the day, a team of CBI and Central Forensic Science Laboratory reached the Muzaffarpur shelter home to investigate the alleged sexual abuse case.
The investigative agency had earlier frozen the bank accounts of Brajesh Thakur and also investigated his properties and bank balance.
Thakur, however, has denied all charges levelled on him and claimed that he was being falsely implicated for planning to join the Congress.
The shelter home was sealed after police raided the vicinity and rescued 44 inmates on July 23.
Eleven employees of the shelter home were arrested for harassing a number of girls residing at the facility.