Lal Pingley Nath Shahdeo joined judicial services in 1958 and his first posting was at post of munsif in
Hazaribagh. He became the first person of Jharkhand to become a judge in the High Court. He became the district and session judge of
Dhanbad in 1989. He was the judge at Ranchi bench of Patna High Court from 1986 to 1992. He was a supporter of separate state since long. In 1992, after retiring from High Court, he started supporting the movement on public platforms, through his writings in local newspapers and helping in legal issue. He led the movement in 1998-99, when the movement was falling apart. In 1998, the
Union government decided to send the Bill concerning formation of Jharkhand State to
Bihar Legislative Assembly to which
Lalu Prasad Yadav had said that the State would be divided over his dead body.
BJP,
JMM,
AJSU,
Congress, a total of 16 political parties came in one platform and formed 'All Party Separate State Formation Committee' to start the movement. Justice Shahdeo was elected as the convener of the committee. The voting on Jharkhand Act was to be done on 21 September 1998 in Bihar legislation. On that day, the committee under the leadership of Justice Shahdeo called for Jharkhand Bandh and organised a protest march. Thousands of supporters of separate state took to streets in leadership of Justice Shadeo by the slogan of
Pehle mati, fir Party. He was arrested and detained in kotwali police station for hours along with many supporters. ==Death==