Verifying mass graves in restricted environments requires a multi-layered approach. Since physical access to remote regions in Eritrea remains strictly controlled, investigators must first rely on high-resolution satellite imagery. Modern sub-meter imagery can detect surface disturbances, such as soil discoloration, unnatural depressions, or changes in vegetation patterns that suggest recent excavation. These digital traces provide the initial evidence needed to flag specific coordinates.
Once coordinates are identified, investigators must gather corroborating testimony. This involves interviewing refugees, former officials, and witnesses who fled the country. Consistent accounts from multiple independent sources can triangulate the location and timing of the alleged killings. While a single witness might err, a pattern of detailed, overlapping testimonies provides a strong basis for suspicion.
Digital forensics and open-source intelligence (OSINT) also play a role. Researchers look for social media posts, photos, or videos shared by locals that might inadvertently show disturbed ground. If field access eventually becomes possible, forensic archeologists use ground-penetrating radar to locate remains without breaking the soil. They document the site carefully, prioritizing the preservation of the physical context to ensure any findings hold up under international legal scrutiny.
