The brother of the victim said the family wanted the trial to be completed at the earliest.
"We are surprised at the suicide but we are not sad. He would have been hanged even otherwise. We wanted him to be hanged publicly. Now we are waiting for the four others to be sent to gallows," he said.
The brother did not suspect any foul play and said guilt might have caught on to him.
Ram Singh and the four other accused in the case were being tried by a fast-track court here. Besides them, a sixth accused, who has been declared a juvenile, is facing proceedings before the Juvenile Justice Board.