• Preserve vehicle condition, event-data-recorder and telematics evidence.
• Collect law-enforcement, 911, body-camera, dash-camera and dispatch records.
• Identify roadway, signal, surveillance and witness evidence.
• Send targeted preservation notices to relevant owners, employers, insurers, repair facilities and digital-data custodians.

Source path identified by the Washington master index: https://www.victimsguide.com/wa-crash-investigation-evidence. The individual source page was not retrievable in this pass; verify the live guide and current Washington primary authority before publication.