Rathore was given six months in prison for molesting the 14-year-old budding tennis player who later committed suicide.
According to highly-placed sources, the ministry may advise the Haryana government to initiate an internal probe to find out who helped Rathore in trying to scuttle the judicial process in the case.
The government has also reportedly decided to serve a show cause notice asking why he should get full pension even after being convicted for Ruchika Girhotra's molestation.
Speaking to reporters, Law Minister Veerappa Moily said, the 19-year delay was 'unpardonable'.
Moily further said that he had discussed the case with the CBI and the Solicitor General of India but was non-committal on whether it will be reopened.