Opening statements were expected Thursday in the trial of a Marysville police officer accused of leaving a loaded handgun in the family van where his son was able to grab it and fatally shoot his 7-year-old sister.

Derek Carlile pleaded not guilty in June to second-degree manslaughter in the March 10 death of his daughter, Jenna, in Stanwood.

Carlile's 3-year-old son allegedly picked up the gun and shot Jenna while their parents were outside the van. She died hours later at Harborview Medical Center in Seattle.

The charging documents indicated Carlile knew the 3-year-old had a fascination with guns. The charges also state that the holster the gun was in had an ankle strap, which Carlile did not use. The van also had a locking compartment where the gun could have been placed.

Carlile s wife is not being charged. Prosecutors said she did not own the gun or bring it to the van, and that she alerted Carlile when he put the gun in the open container, assuming he would move it someplace safe.

If convicted, Carlile could face two years and three months in prison.

Story compiled by KING 5's Travis Pittman

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