A judge ruled Thursday that convicted Baton Rouge serial murderer Sean Vincent Gillis will play no role in the second-degree murder trial of suspected serial killer Jeffery Lee Guillory.

Opening statements in Guillory’s trial are scheduled to begin Thursday afternoon.

Attorneys for Guillory, 45, contend Gillis, of Baton Rouge, associated with Renee Newman, the 46-year-old Baton Rouge woman Guillory is accused of strangling in 2002.

Guillory’s attorneys had subpoenaed Gillis to testify at the trial, and they also wanted to introduce into evidence a transcript of Gillis’ 2004 police interrogation.

But state District Judge Tony Marabella ruled the defense could make no reference to Gillis at the trial.

Guillory’s attorneys said they will ask the state 1st Circuit Court of Appeal to review the judge’s ruling. Marabella said he would not halt the trial.

Prosecutor Dana Cummings had argued to Marabella that the defense is entitled to present a defense, “but not one that is bogus and lame.’’

Robert Savage, one of Guillory’s attorneys, had argued that the similarities between Gillis’ crimes and the Newman murder are “overwhelming.’’

“Sean Gillis was part of the investigation’’ into Renee Newman’s killing, Savage said. “We have a right to present this evidence.’’

Guillory faces an automatic sentence of life in prison if convicted of second-degree murder in Newman’s death.