Unrecorded crime is one of the greatest challenges facing policing today. Ineffective police-recording of crimes can break trust between the Police and public, and lead to failing crime prevention strategies. After facing criticism about crime-data management, Greater Manchester Police (GMP) recently implemented measures aimed at improving its crime-recording system. In this blog, Yongyu Zeng, Angelo Moretti and David Buil-Gil make the case that, whilst welcomed, improvements to crime-reporting systems and processes may still be inaccurate for evidence-based policing in Greater Manchester.