The 11-year-old boy's mother reportedly watched her son's stabbing on a home security camera before calling 911, sparking the chase that ended with the father's death.

Marvin Morales, a former deputy suspected of fatally stabbing his 11-year-old child in Elk Grove, was shot and killed by law enforcement along Interstate 5 near Lodi.

"Just luck. Sheer luck," Cooper said. After Morales hit spike strips and crashed off the freeway, Cooper witnessed the subsequent deadly shooting, in which an Elk Grove officer and two of Cooper's deputies fired their weapons. Cooper said the officer and deputies were justified in the shooting.

The California Department of Justice has opened an investigation into the fatal shooting by law enforcement of a former Sacramento County sheriff's deputy, the state agency said Wednesday.