ORLANDO, Fla. -- Attorneys for Casey Anthony asked a judge to block prosecutors from getting any testimony from bounty hunter Leonard Padilla and his associates.

Anthony's defense attorneys filed the motion Thursday afternoon. They said Padilla and his partners had a privacy agreement with the defense, so anything they learned would be considered privileged information.

The defense is also seeking access to documents created by Texas Equusearch and its founder Tim Miller. The search group assisted in searches for Anthony's missing daughter, Caylee Anthony.

The documents the defense is seeking are in Texas and are not subject to Florida circuit court subpoenas, but the defense is seeking to have Miller certified as a material witness. The defense hopes to add more weight to the their argument that Miller and the records he maintains identifying those who searched for Caylee's body should be produced.

Meter reader Roy Kronk found Caylee's body in December after five months of searching.

Anthony is being held at the Orange County Jail on no bond on murder charges in the death of her daughter.