Absconding since February 27, Prajapati apparently came under pressure after two of his sons were detained by the Uttar Pradesh Police on Tuesday. He was very close to Samajwadi Party founder Mulayam Singh Yadav and Chief Minister Akhilesh Yadav.
Prajapati unsuccessfully contested the recent state assembly elections from Amethi. He had won from there in 2012. Six others accused in the same case were held earlier.
In February, the Supreme Court had ordered the state police to lodge an FIR against him.
The gang rape victim had accused Prajapati's henchmen of terrorising her and her daughter in a Delhi hospital.
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