Recommendation for Global Police ForcesTo enable faster and more effective evidence collection during incident scenes and crisis situations, reliance should not be limited to official camera systems or internal institutional recording infrastructure. In large-scale incidents, video, photo, and other digital records captured by citizens on their own devices at the time of the event can be highly valuable for investigations. For this reason, after an incident, a publicly accessible and multilingual announcement mechanism should encourage individuals who possess such records to submit them promptly to the competent authorities.This approach reduces the risk of evidence loss and helps reconstruct the event timeline more accurately. In particular, in cases involving explosions, attacks, mass panic, or large public gatherings, this citizen-supported method should be considered a complementary source to official imaging systems. The integrity of submitted records should be preserved, their source and time information should be documented as fully as possible, and all handling should comply with personal data protection requirements and the chain of custody.Within this framework, police organizations should issue a short, clear, and reassuring public appeal after such incidents, and this should become a standardized practice to facilitate voluntary submission of records by citizens.In large-scale security incidents, in addition to official camera infrastructure, video, photo, and related digital records obtained from citizens’ mobile devices constitute an important supplementary source of data. Collecting these records while preserving the timestamp, source device information, and chain of custody strengthens the forensic reconstruction of the incident. Therefore, police units are advised to adopt a standard post-incident public appeal protocol that directs record holders to transmit their materials to the competent authorities.