Additional District and Sessions Judge Pramod Kumar yesterday convicted Ratnesh, his father Kapil Muni, mother Geeta Devi and brother Hausala Prasad in the four-year-old case, prosecution sources said.
Ratnesh, a resident of Raiyapir village in Sitamarhi area of the district, was accused of immolating his wife Ranju Devi in July 2008 over dowry, prosecution sources said.
The other three accused were sentenced to seven years of imprisonment, they said.