A judge rejected a motion Friday to dismiss murder charges against Edgar Ray Killen.
Killen, a former lumber mill operator from Union, took the stand briefly to testify about his financial status.
He's accused of orchestrating the murders of James Chaney, Michael Schwerner and Andrew Goodman in rural Neshoba County.
A 1967 federal trial revealed that the killings were part of a Ku Klux Klan conspiracy.
Circuit Judge Marcus Gordon granted a prosecution motion to sequester the jury during Killen's trial, now scheduled to begin Apr. 18. He reserved rulings on some other motions, including one dealing with transcript testimony.
Defense attorney Mitch Moran had wanted Gordon to dismiss the case, largely on speedy trial issues. Gordon, however, said he saw no evidence of an intentional delay.
Prosecutors are asking that former testimony from Killen's 1967 conspiracy trial be admissible and that the defendant notify the state prior to the trial of any objections to the transcript.