Knowing why car accident evidence disappears, and how to preserve it, is the first step in protecting your rights. Weather conditions can wash away tire marks and debris, surveillance systems automatically delete or overwrite footage after set periods, and witnesses may become unreliable or unavailable over time. When crucial evidence from your Chicago car accident case vanishes, it can undermine your claim and affect your compensation. While you focus on recovering from your injuries and managing medical treatment, a car accident lawyer can employ legal tools to preserve this essential evidence before it's lost forever. Acting swiftly to protect evidence creates a strong foundation for your case and could significantly impact your outcome.