The cellphones belonging to Cameron Isaac and Ninimbe Mitchell were in approximately the same location where Xiaopeng “Pippen” Yuan was killed at the time he was killed, an expert said Wednesday during the murder trial of Isaac and Mitchell. Rafal Dobrowolski, an expert in cellphone mapping and analysis, used Google Maps to show jurors the approximate locations of the cellphones belonging to Isaac and Mitchell in the hours leading up to Yuan’s death. Dobrowolski works in the criminal investigations unit of the Onondaga County Sheriff’s Office. Dobrowolski’s analysis of cellphones is possible because of cell tower information. When a cellphone sends a signal to a cell tower, it can then be traced to the approximate area where the cellphone is located
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