Nikhil had gone to the river bank where he slipped and fell in the river yesterday.
(REOPENS CES1)
A local court later sent Das to police remand till March 7.
A senior police officer said what Das has been claiming could be misleading. "We are also looking into other angles, too."
Asked whether there could be involvement of other persons besides Das in the murder, he said "We are not ruling out anything.