Politician Mulayam Singh Yadav and his sons Akhilesh and Prateek will be investigated for alleged corruption, the Supreme Court said today. The Yadavs are the first family of Uttar Pradesh. While Mulayam heads the Samajwadi Party, his older son 39-year-old Akhilesh is the chief minister of the state. Prateek, a bodybuilder, is prepping for his political debut.