Lucknow/ New Delhi, Aug 7 (ANI): A case has been registered against Samajwadi Party leader Amarmani Tripathi's son Amanmani for abduction and extorting money from a former aide Rishi Kumar Pandey. Pandey was heading towards AIIMS in his car in Delhi when the incident took place. Amanmani's father Amarmani Tripathi is serving life term in the Madhumita murder case.