Industrial Claim Appeals Office v. Town of Castle Rock

Summary

The court held that an employer may rebut the statutory presumption that a qualifying firefighter's cancer is job-related by presenting particularized risk-factor evidence showing that the cancer more probably arose from a non-work source. The employer need not prove a specific alternate cause, but must establish by a preponderance of the medical evidence that employment did not cause the particular cancer. The court affirmed the court of appeals and remanded for reconsideration by the administrative law judge.