摘要:Extreme Risk Protection Orders (ERPOs) are a relatively new type of law that are being considered or implemented in many states in the United States. Colorado’s law went into effect on January 1, 2020, after significant controversy and concern over potential misuse of the law to confiscate weapons; many ( n = 37 of 64) counties declared themselves “2nd Amendment (2A) sanctuaries” and said they would not enforce the law. Here, reviewed the patterns of use of the law during its first year. Methods We obtained all court records for ERPO petitions filed between January 1 and December 31, 2020. Data elements were abstracted by trained staff using a standardized guide. We calculated the proportion of petitions that were approved or denied/dismissed, identified cases of obvious misuse, and examined patterns by 2A county status. Finding and results In 2020, 109 ERPO petitions were filed in Colorado; of these, 61 were granted for a temporary ERPO and 49 for a full (year-long) ERPO. Most petitions filed by law enforcement officers were granted (85%), compared to only 15% of petitions filed by family or household members. Of the 37 2A sanctuary counties, 24% had at least one petition filed, versus 48% of non-2A sanctuary counties. Across the 2A counties, there were 1.52 ERPOs filed per 100,000 population, compared to 2.05 ERPOs filed per 100,000 in non-2A counties. There were 4 cases of obvious law misuse; none of those petitions resulted in an ERPO or firearm confiscation. Conclusion State-level studies suggest ERPOs may prevent firearm injuries. Robust implementation, however, is critical for maximal effect. Understanding ERPO experiences and challenges can inform policy creation and enaction in other states, including identifying how best to address concerns and facilitate evaluation.