He has been taken to the CBI office here where he is currently being interrogated.
The girl tried to set herself on fire outside the Chief Minister's residence on Sunday, claiming inaction in the gang rape case.
Later on Sunday, her father was picked up by police and allegedly roughed up by Senger's brother Atul Singh and his aides after which he died.
The incident has triggered a political storm and public outrage in the state.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)