S R Mardi, Inspector General of Police said, "Virbhadra Singh and his wife Pratibha Singh were booked Monday, Aug 3 night by the state vigilance and anti-corruption bureau under relevant sections of the IPC (Indian Penal Code)."
Mardi also said that they were booked on the basis of an audio CD released by Virbhadra Singh's political adversary Vijai Singh Mankotia in 2008.
In the CD, Virbhadra Singh was heard referring to some monetary transactions on phone with former IAS officer Mahinder Lal, who is dead. The CD also contained recordings of his wife, a former MP from Mandi in Himachal Pradesh.
Earlier, former Congress minister Mankotia, who had demanded the registration of the case against Virbhadra Singh and others, had released the CD before the Hamirpur parliamentary by-election in May 2008.