"Speaker Uday Narayan Chaudhary took a hardcore naxalite Murari Yadav with him as his aide to a trip to Japan on official expense," Prasad told reporters while making a blistering attack on him.
The RJD chief also alleged that Chaudhary was involved in murder case of his party MP from Gaya Rajesh Kumar.
"I have called kin of former RJD MP to bring all documents against Chaudhary in the case," he added.
"In the notification the 13 MLAs have been referred as former members of RJD...How can you say this when party did not expel them or they have resigned on their own," he said pointing out lacunae in the notification.
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Prasad, who had marched to the Assembly with 9 of the 13 MLAs who turned up for RJD Legislature party meeting denying quitting the party, said the notification was "unconstitutional" and violated anti-defection laws.
Prasad had also petitioned Governor D Y Patil against the notification last evening and urged him to get it withdrawn.
The RJD chief today claimed that Raghvendra Pratap Singh, who was among 4 absentee in the yesterday's Legislature party meeting, has contacted him and assured that he is very much in the party and would present himself from the Speaker to prove this.