On January 14, 1978, Police Officer Jay Warren Jackson, 29, was killed in the line of duty in West Covina, California. Officer Jackson, a U.S. Army veteran with five years’ service, joined a pursuit that began after a driver failed to stop at Orange Avenue and Garvey Avenue South and continued eastbound on the I-10 freeway. The chase ended when the suspect’s vehicle spun out near Holt Avenue and Garvey Avenue South.

As Officer Jackson exited his patrol car, the suspect — who had escaped from a psychiatric care facility and had made suicidal threats — opened fire from inside the vehicle, fatally wounding Officer Jackson. Other officers returned fire and killed the suspect at the scene. Officer Jackson was survived by his wife and one child.

What information might help clarify the suspect’s history before the incident or the circumstances that led to the escape and the pursuit?