John Mark Karr, the former suspect in the JonBenet Ramsey murder, got a trio of new lawyers Tuesday to fight his five-year-old child pornography case in Sonoma County. Karr, 41, remains in a Colorado jail pending extradition to Santa Rosa by Sept. 13. Citing security and publicity concerns, authorities have refused to say when Karr would be transported. During a brief hearing Tuesday morning, San Francisco attorney Rob Amparn officially took over Karr's case from the Sonoma C ounty public defender. He and two associates will defend Karr on the misdemeanor charges. Signaling an aggressive defense, Amparn promptly asserted Karr's right to a speedy trial and asked Judge Cerena Wong to al low Karr to be release d from custody. Withdrawal of the time waiver, which Karr agreed to while in custody in 2001, means prosecutors have 30 days - until Oct.