Indigenous peoples across Turtle Island (North America) face disproportionate rates of disappearance and murder, a "genocide" rooted in settler-colonial violence and systemic erasure. Technology plays a crucial role in the Missing and Murdered Indigenous Relatives (MMIR) crisis: perpetuating harm and impeding investigations, yet enabling advocacy and resistance. Communities utilize technologies such as AMBER alerts, news websites, social media groups, and campaigns (like #MMIW, #MMIWR, #NoMoreStolenSisters, and #NoMoreStolenDaughters) to mobilize searches, amplify awareness, and honor missing relatives. Yet, little research in HCI has critically examined technology's role in shaping the MMIR crisis by centering community voices. Through a large-scale study, we analyze 140 webpages to identify systemic, technological, and institutional barriers that hinder communities' efforts, while highlighting socio-technical actions that foster healing and safety. Finally, we amplify Indigenous voices by providing a dataset of stories that resist epistemic erasure, along with recommendations for HCI researchers to support Indigenous-led initiatives with cultural sensitivity, accountability, and self-determination.

翻译：在龟岛（北美大陆），原住民群体面临异常高发的失踪与谋杀事件，这一植根于殖民者暴力与系统性抹除的“种族灭绝”现象亟待关注。技术在失踪与被谋杀原住民亲属（MMIR）危机中扮演着双重角色：既可能延续伤害并阻碍调查，亦能成为倡导与抗争的赋能工具。原住民社区正运用AMBER警报、新闻网站、社交媒体群组及社会运动（如#MMIW、#MMIWR、#NoMoreStolenSisters与#NoMoreStolenDaughters等标签行动）动员搜寻、提升公众意识并纪念失踪亲属。然而，人机交互领域鲜有研究以社区声音为核心，批判性审视技术如何形塑MMIR危机。本研究通过大规模分析140个网页数据，系统识别阻碍社区行动的体制性、技术性与制度性壁垒，同时揭示促进疗愈与安全的社会技术实践。最后，我们通过构建抵抗认知抹除的叙事数据集来放大原住民主体声音，并为人机交互研究者提出行动建议，倡导以文化敏感性、问责制与自决权为核心，支持原住民主导的倡议行动。