Centennial, Colo. (AP) Lawyers are expected to begin their closing arguments Thursday in the trial of a man accused of killing two people, including a witness who was scheduled to testify against him.

Sir Mario Owens could face the death penalty if convicted of first-degree murder in the june 2005 shooting deaths of Javad Marshall-Fields and Vivian Wolfe.

Marshall-Fields was to testify against Owens and another man in a separate shooting death. Owens was eventually convicted of first-degree murder and sentenced to life in prison without parole in that case.

Wolfe was Marshall-Fields' fiancee.