The federal investigation looked at evidence such as witness statements, audio and video recordings, dispatch records, police reports, and autopsy reports to determine whether the officers acted willfully with the intent to use objectively unreasonable force.
联邦调查人员检查了相关证据，包括目击证人证言、现场视频与录音、出警记录、警察报告和尸检报告，用于判断当事警察是否故意使用超过客观合理限度的武力。