“…The 'usual suspects' for data are well known. These CrimRxiv Forewarned is forearmed: the hidden curriculum of working with police crime data 3 include calls for service (e.g., Laufs et al, 2021;Ratcliffe, 2021), crime records (e.g., Birks et al, 2020;Chainey et al, 2019;Haberman et al, 2021), offender proceedings data such as detections, arrests, apprehensions and charges (e.g., Payne, 2007;Piatkowska & Camacho, 2022;Strom & Planty, 2022) and traffic or pedestrian stops (e.g., Pierson et al, 2020;Tiratelli et al, 2018). Police typically record the time and place the event occurred, a code capturing the general nature of the event (e.g., crime type), some free text details, and the identities (if known) of the people involved.…”