The cause behind the Diamond Fire that scorched the North Scottsdale area in June 2023 remains unknown, as officials have concluded the investigation without enough evidence to pinpoint the spark. In a statement reported by the Arizona Department of Forestry and Fire Management, the investigators have cited the impossibility to establish a definitive cause due to key evidence being compromised in the initial phase of firefighting efforts. “Upon arrival of the first engines on scene, their priority was to provide immediate structure protection to nearby threatened homes, which left the possible point of origin unsecured through the first operational period,” explained Aaron Casem, the department’s wildland fire investigator.