Alfa building in Beirut. (The Daily Star/Mohammad Azakir)
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Alfa representative detailed how his network pieced together records for submission to the Special Tribunal for Lebanon Monday, as it attempted to produce maps reflecting cellular coverage at the time of the Rafik Hariri assassination.Investigators identified the defendants and brought charges against them based on information gleaned from analysis of cellular data and billing records.The anonymous Alfa representative described how his company produced maps of coverage for investigators in response to requests from the office of the prosecutor. The development of newer, purportedly more accurate models led Alfa to submit additional information to investigators in 2010, 2013, and 2015 . Propagation models are used by cellular networks to develop and expand their networks, and are regularly updated to try to minimize the disparity between actual and predicted coverage.
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