LOS ANGELES (CNS) - A state panel denied parole today for a man convicted of conspiracy in the Halloween 1985 shooting death of a Los Angeles police detective who was ambushed while picking up his 6-year-old son from day care.

Voltaire Alphonse Williams will be eligible for another parole hearing in two years, according to Deputy District Attorney Larry Morrison. Williams was convicted of conspiracy in the plot to kill Los Angeles Police Department Detective Thomas C. Williams, who was not related to him.

The 42-year-old police detective was shot while he was picking up his son at a Canoga Park day care center on Oct. 31, 1985, after testifying in a robbery case against Jenkins. The detective's son was not hit by the gunfire.

Williams was sentenced in April 1989 to 25 years to life in state prison. Co-defendant Daniel Jenkins was sentenced in October 1988 to death row for the murder, and a third man, Ruben Moss, was sentenced in December 1988 to life in prison without the possibility of parole.

Los Angeles Police Protective League President Paul M. Weber praised the decision. "It is crucial to the security of the state of California and to the safety of the men and women who enforce its laws, that killers forfeit their freedom for life when they murder a law enforcement officer,'' said Weber, whose group represents the Los Angeles Police Department's officers and had opposed granting parole to Williams.

"Voltaire Williams participated in the callous and calculating murder of Detective Williams. It was a murder designed to prevent Detective Williams from doing his job."