Bansal was last month granted bail by the Central Bureau of Investigation's (CBI) Special Judge against a bond of Rs 1 lakh.
The police have recovered a suicide note from Bansal's residence at Nilkanth Apartment and started the investigation into the matter.
Bansal was arrested by the CBI on July 16. He was accused of receiving Rs 9 lakh from Mumbai-based Elder Pharmaceuticals.
He was an additional secretary-ranked Director General in the Corporate Affairs Ministry.
His wife Satyabala (58) and daughter Neha (28) had allegedly hung themselves from ceiling fans in separate rooms at their residence in Nilkanth Apartments in east Delhi’s Madhu Vihar on July 19.
On July 22, Bansal had alleged before the court that CBI had compelled his wife and daughter to take the extreme step.
Both the women have left separate suicide notes, saying CBI raid had caused “great humiliation” and they did not want to live after that. They, however, held nobody responsible for their death.
Satyabala was a homemaker. Neha was pursuing a course under a private university.
(With inputs from agencies)