Updated

A jury is deliberating the case of an Oklahoma police captain charged with manslaughter in the shooting death of an unarmed teenager.

Jurors began deliberating about 4:30 p.m. Monday in the trial of Del City police Capt. Randy Harrison. Harrison is charged in the March 14, 2012, death of 18-year-old Dane Scott Jr. A 23-year veteran officer in an Oklahoma City suburb, Harrison has pleaded not guilty.

Harrison had arrested Scott on drug violations previously, and prosecutors say he became so fixated on the teen that he finally crossed the line, shooting him in the back at a time when he posed no threat.

But Harrison testified that he had no choice. Harrison had disarmed Scott during a scuffle but says he believed Scott was reaching for another handgun.