Former Samajwadi Party MLA, Pramod Gupta on January 20 levelled a strong allegation against Samajwadi Party Chief Akhilesh Yadav and said that he has imprisoned his father Mulayam Singh Yadav. “I will join BJP around 12 pm(today)... Akhilesh Yadav has imprisoned Mulayam Singh Yadav and his position is very bad in the party... Criminals and gamblers have been inducted to Samajwadi Party,” he added.