You prove a lane-change crash with hard evidence showing who moved, when they moved, and where the vehicles ended up. On I-90 near Northwest Boulevard in Coeur d'Alene, that means beating the clock before skid marks fade, dashcam files overwrite, and the other driver changes their story.

Here's what you need:

• Photos and video from the scene immediately. Get the lane lines, gouge marks, debris, shoulder position, and damage angles on both vehicles. In spring thaw season, photograph potholes, frost heaves, broken pavement, and standing water too. Insurers love claiming your spouse "just lost control" because of road conditions.
• Dashcam footage. Save your own file and demand preservation of any commercial footage if a delivery van or company vehicle was involved. Many systems overwrite in days.
• Witness names, phone numbers, and a recorded statement that day. Neutral witnesses are gold. People get vague fast.
• The police report number and agency. In Coeur d'Alene city streets, it may be Coeur d'Alene Police Department. On I-90, it is often Idaho State Police. The report helps, but it is not magic. If the officer did not see the crash, the report is only part of the proof.
• Vehicle damage photos before repairs. Side-swipe height, paint transfer, mirror damage, and wheel impact points often show which car entered the other lane.
• 911 call logs and bodycam if officers responded.
• Phone records if the other driver was looking down or delayed braking. The exact timestamps matter.
• Medical records from the first visit forward. Gaps make insurers say the injury is exaggerated. If care escalates to Boise, records from Saint Alphonsus Regional Medical Center can help tie the trauma to the crash timeline.
• A preservation request for black-box data if the vehicle is newer. Steering, speed, and braking data can disappear after repairs or storage moves.

If your spouse was hit and is overwhelmed, start by locking down the scene evidence, witnesses, dashcam, report number, and repair photos today. That is the case. The rest is arguing over what it means.