LUCKNOW, March 2 -- The voice sample of Congress MP from Sitapur Rakesh Rathore, who is in jail on rape charges, will be examined at the Forensic Science Laboratory (FSL), Mahanagar in Lucknow, on Tuesday to ascertain that it is his voice in a recorded telephonic conversation presented by the 45-year-old rape survivor to prove her charges against him, said senior police officials on Sunday.

Earlier, the Sitapur police had lodged an FIR of rape against Rathore on the complaint of the woman, who was once close to the MP, accusing him of raping her multiple times in the past four years on the promise of marrying her and building her political career.

The FIR was lodged with Sitapur City Kotwali under Bhartiya Nyay Sanhita (BNS) sections 64...