"We support fair investigation. He has been sent to seven-day CBI custody," Sengar's lawyer said.
A medical superintendent and a casualty officer at UP's Unnao district hospital were also suspended yesterday in connection with the said case.
An FIR was lodged against the BJP MLA on Thursday under sections 363 (kidnapping), 366 (abduction of woman), 376 (rape), 506 (criminal intimidation) of the Indian Penal Code (IPC) and Protection of Children from Sexual Offences (POCSO) Act, and the case was handed over to the CBI.
The teen had accused the MLA of raping her in June last year.
The victim's family had also alleged that the accused MLA's brother, Atul Singh Sengar, along with his companions also raped the girl and thrashed the victim's father on April 3 for refusing to withdraw the FIR over the same.
Atul Singh and five other accused were sent to jail on Thursday.