He submitted his resignation letter to the Principal Secretary, Home Department, citing inordinate delay in the trial, which he said had caused a lot of strain and also various attempts to dislodge him from the post which had "hurt him to no end".
"I feel very happy and relieved that I am free from all responsibilities today," Acharya, a distinguished member of the Central Law Commission, told PTI.
"I accepted this assignment (SPP) seven years ago. I was hoping the case will be over in almost six months or almost one year. But even after seven years there is a long way to go before the trial is completed".
"As of now I am unable to withstand the strain which this post carries with it," he said, adding that "various attempts have been made to force me to quit including filing of a false complaint and getting an order of investigation in it".
"However, though the High Court has quashed it, these developments have hurt me deeply, causing mental agony and embarrassment. Therefore I do not wish to continue".
The special court was constituted here on November 18, 2003 on orders of the Supreme Court to transfer the case from Tamil Nadu to Karnataka.