Table 2.

Summary of key points from articles categorized within investigative tools and techniques.

Reference	Investigation Tool or Technique	Design
Bennett, 2020 [8]	The study examines the use of media in cold case investigation.	Qualitative
Bettels et al., 2022 [10]	The study describes the international collaborative effort between academics and police in cold case work, wherein participants reported significant knowledge exchange and increases in competency.	Qualitative
Byers and DuBois, 2017 [14]	The study investigates successful collaboration between university students from relevant fields and law enforcement, with specific reference to the production of detailed summaries and reports.	Qualitative
Davis et al., 2014 [30]	This study examines factors contributing towards cold case clearance and highlights the need for new leads.	Mixed Methods
Fox et al., 2020 [34]	The study explores the collaboration between academics and law enforcement and highlights how this could help garner unique novel perspectives to aid cold case investigations.	Qualitative
Yaksic, 2020 [91]	The study examines the collaborative effect between investigative journalists and law enforcement agencies and the use of offender profiling to help progress a cold case.	Qualitative