Mohammad Shahabuddin, who was sentenced to life in prison on Tuesday, has 52 criminal cases registered against him.
The Rashtriya Janata Dal's Lok Sabha member was awarded a life sentence in a case involving the kidnapping of a Communist Party of India-Marxist Leninist worker eight years ago.
His criminal career began in 1985 with a case registered against him in connection with a kidnapping at Siwan town police station.
According to police records, the criminal cases registered against Shahabuddin include murder, attempt to murder, kidnapping, extortion, offences under the Arms Act and Wildlife Protection Act.
He has been accused of links with Pakistan's notorious Inter Services Intelligence agency and fugitive gangster Dawood Ibrahim. Then Bihar Director General of Police D P Ojha alleged that Shahabuddin had links with the ISI. Ojha also accused the MP of links with the terrorist organisation, Lashkar-e-Tayiba.
Shahabuddin
A year later, in 1996, Lalu Yadav asked him to contest the Siwan Lok Sabha seat. Shahabuddin has since won the seat four times in a row.