In forensic investigations it is often of value to establish whether two phones were used by the same person during a given time period. We present a method that uses time and location of cell tower registrations of mobile phones to assess the strength of evidence that any pair of phones were used by the same person. The method is transparent as it uses logistic regression to discriminate between the hypotheses of same and different user, and a standard kernel density estimation to quantify the weight of evidence in terms of a likelihood ratio. We further add to previous theoretical work by training and validating our method on real world data, paving the way for application in practice. The method shows good performance under different modeling choices and robustness under lower quantity or quality of data. We discuss practical usage in court.

翻译：在法医调查中,通常有必要确定同一人是否在特定时期内使用了两部手机。我们提出了一个方法,利用手机手机手机信号塔登记的时间和地点来评估同一人使用任何一部手机的证据强度。这种方法是透明的,因为它使用后勤回归来区分同一用户和不同用户的假设,用标准内核密度估计来从概率比率的角度量化证据的重量。我们通过培训和验证我们关于真实世界数据的方法,进一步补充了先前的理论工作,为实际应用铺平了道路。这种方法在数据数量或质量较低的不同模型选择和稳健性下显示了良好的表现。我们讨论了法院的实际使用情况。