(AP) - A former Yale University lab technician charged with killing a female graduate student appeared before a judge Tuesday, but did not enter a plea to murder.

Raymond Clark III, 24, remained silent throughout the proceedings at New Haven Superior Court. He's accused of strangling 24-year-old Annie Le, of Placerville, Calif., and stuffing her body behind a lab wall.

The judge scheduled a probable cause hearing for Oct. 20, in which sides will have the right to introduce evidence and call witnesses. Under Connecticut law, defendants accused of murder have the right to the hearing within 60 days of their arrest to decide if the case will go forward.

Under state law, defendants charged with crimes punishable by death or life in prison do not enter a plea before a judge determines there is probable cause to believe they committed the crime. Defendants may waive their right to a probable cause hearing.

Clark's attorney, Joseph Lopez, said his client will plead not guilty after they decide whether to waive his right to a probable cause hearing.

The judge says the hearing will also address a motion filed by the Hartford Courant to unseal Clark's arrest warrant.

Le was a pharmacology graduate student who vanished Sept. 8 from a Yale medical lab building. Her body was found five days later, on what was supposed to have been her wedding day.

Investigators, who had been keeping around-the-clock surveillance of Clark, labeled him a person of interest two days later and got a court order to take forensic evidence from him and search his apartment. Clark was arrested Sept. 17 after DNA evidence linked him to Le's body.

He has been jailed since his arrest. A judge set his bond at $3 million.

Police have not talked about a motive in the slaying, largely because Clark has not talked to authorities. Investigators and Yale officials have called Le's death a case of workplace violence, but have not elaborated.