Mohanty is the son of B.B. Mohanty, a former director general of police-rank officer in Odisha. He had raped a German tourist in Rajasthan's Alwar district March 21, 2006 and convicted on April 12, 2006.
Singh said that they received information from Kerala Police Friday evening that they had detained a man on suspicion of his being Mohanty.
"The Kerala Police told us that the man worked at the State Bank of Travancore (SBT). We would confirm the identity only after reaching Kerala," the officer said.
Mohanty was sentenced to seven years' imprisonment on rape charges. In November 2006, he secured parole to meet his ailing mother. Since then, his whereabouts are unknown.
Mohanty's father served as director general, Home Guards and Fire Services at the time when Mohanty committed the crime, and was accused of aiding the son's escape.
He had been arrested for aiding the son's escape in January 2008, but was however released on bail after remaining in custody for a few days.