Punjab's former director general of police Mohammad Mustafa and his wife Razia Sultana, a former state minister, have been booked in connection with the death of their son, Haryana Police said.
Akil Akhter, an advocate, died in Haryana's Panchkula on Thursday. Also booked in the case are Akhter's wife and sister.
The FIR was registered on October 20 under Sections 103 (1) and 61, which deal with murder and criminal conspiracy charges, after a man named Shamshuddin, in a complaint, alleged foul play in the death, saying Akhter died under "suspicious circumstances", the police said.
They have been booked based on Shamshuddin's complaint, which alleged Akhter had recorded a video levelling serious allegations against his family, they said.
According to Panchkula DCP Srishti Gupta, on October 16, Akhter, a resident of Sector 4, MDC, Panchkula, was found dead at his residence. The family intimated the police, and said that when they opened the room, he was found dead.