Aaron Hernandez’s fiancee is due back in court Wednesday, one day after a judge made an important ruling about her presence during his murder trials. Shayanna Jenkins is charged with perjury related to the murder investigation of Hernandez.

The hearing is set for two petitions by prosecutors to grant immunity to Jenkins and one other witness.

On Tuesday, the judge ruled that five people on the witness list, that included Jenkins, Hernandez’s mother and Odin Lloyd’s mother, would be allowed to sit through the trial. That, even though Jenkins is a potential witness.

Jenkins’ lawyer, Janice Bassil, did not return an email sent Monday seeking more information about the hearing. Jenkins and Hernandez have a child together.

The judge indicated there may be another hearing Thursday before jury selection begins.

Jury selection is set to begin Friday for Hernandez, who has pleaded not guilty to killing Lloyd, a semiprofessional football player. Hernandez was a tight end for the Patriots with a $40 million contract when prosecutors say he killed Lloyd in an industrial park near his North Attleboro home in June 2013. Lloyd, 27, was dating the sister of Jenkins.

The trial is expected to last six to 10 weeks, and dozens of witnesses could be called, including Patriots coach Bill Belichick and team owner Robert Kraft.

Hernandez also has pleaded not guilty in the fatal shootings of two men in 2012 after an encounter at a Boston nightclub. That case has not yet gone to trial.