Pervasive digital technologies are increasingly used to record different aspects of citizens’ lives, from
activity and location tracking, to social interactions and video recordings of life experiences. However,
effective use of these technologies to strengthen collaborations between citizens and police requires a
fresh examination of the creation and use of evidence. We extend the concept of Citizen Forensics to denote
this new model of citizen-police collaboration. By drawing on the literature on citizen science and
community policing, we identify the challenges that must be addressed to meet the important societal need of
improving citizen-police collaborations.