After playing cat-and-mouse with Mulayam Singh Yadav for six years, the UPA looks all set to close the CBI's investigation into potential corruption by the Samajwadi Party chief and his family. This week, from Lucknow to the Yadav heartland of Etawah, we investigate how the Central Bureau of Investigation (CBI) is turning its back on its own findings - that the first family of Uttar Pradesh politics may have amassed crores of assets, way beyond their earnings.