The Ramgarh district court delivered judgment in the 2010 coal theft case.
Mahto is at present legislator from Gomia assembly seat. He is a resident of Ramgarh district and had a coke plant.
In 2010, the Ramgarh police had lodged a coal theft case as illegal coal was recovered from his coke plant.
He will be second legislator of the current assembly to lose membership after being convicted by a court. Two years ago, All Jharkhand Students Union (AJSU) legislator Kamal Kishore Bhagat was convicted and awarded seven years' imprisonment in another case.
As per the constitutional provisions, if a legislator or member of Parliament is convicted and awarded at least two years' imprisonment, then he/she will lose membership of the assembly/ Parliament.