JOLIET, Ill. (WKOW) -- An judge will decide whether to allow hearsay evidence in the first-degree murder trial of Drew Peterson.
Peterson is charged with murdering his wife, Kathleen Savio, who drowned in a bathtub.
One of Savio's former co-workers says she told him that Peterson, a former police officer, threw her to the floor one night, grabbed her throat and had a knife, and told her he "could kill her there and then."
Issam Karam testified Tuesday, and a judge will eventually determine whether Savio essentially will testify from the grave when Peterson stands trial.
A judge may admit hearsay evidence in first-degree murder cases if prosecutors can prove a defendant killed a witness to prevent him or her from testifying. The judge will then decide if jurors can hear the hearsay.
Peterson has plead not guilty.