Former Jharkhand Chief Minister Hemant Soren arrived in assembly today amid tight security as Champai Soren - who stepped into his shoes after his arrest - faced a trust vote to prove his government's majority. Addressing the assembly, Mr Soren alleged that even Raj Bhavan had a role to play in his arrest. "On the night of January 31, for the first time in the country, a chief minister was arrested...and I believe that Raj Bhavan was also involved in this incident," he said.