Mumbai: The alleged murder of Sheena Bora, daughter of Indrani Mukherjea, continues to remain a mystery even as the Mumbai police are trying to unearth the motive behind the heinous crime. Police arrested Indrani, the wife of Peter Mukerjea on charges of murdering her “sister” Sheena Bora in 2012 and dumping the body in the ravines of Raigad district in Maharashtra.