McLean, R. Robinson, G. & Densley, J. (2020). County lines: criminal networks and evolving drug markets in Britain. Cham, Switzerland: Springer.

Bumgarner, J., Hilal, S., & Densley, J. (2016). Minnesota’s criminal justice system. Durham, NC: Carolina Academic Press.

Densley, J. (2013). How gangs work: An ethnography of youth violence. New York: Palgrave Macmillan.

Edited Volumes

Densley, J., Deuchar, R. & Harding, S. (2020). Gangs and serious youth violence in the UK: Special issue. Youth Justice.

Peer-Reviewed Articles

40. Densley. J., Deuchar, R. & Harding, S. (in press). An introduction to gangs and serious youth violence in the United Kingdom. Youth Justice.

39. Densley, J. & Pyrooz, D. (in press). The Matrix in context: taking stock of police gang databases in London and beyond. Youth Justice. doi: 10.1177/1473225419883706.

38. Peterson, J., Densley, J. & Erickson, G. (in press) Evaluation of 'the R-Model' crisis intervention de-escalation training for law enforcement. The Police Journal. doi: 10.1177/0032258X19864997.

37. Whittaker, A., Densley, J., Cheston, L., Tyrell, T., Higgins, M., Felix-Baptiste, C. & Havard, T. (in press). Reluctant Gangsters revisited: the evolution of gangs from postcodes to profits. European Journal on Criminal Policy and Research. doi: 10.1007/s10610-019-09408-4.

36. Roks, R. & Densley, J. (in press). From brakers to bikers: the evolution of the Dutch Crips ‘gang’. Deviant Behavior. doi: 10.1080/01639625.2019.1572301

35. Deuchar, R., Harding, S. McLean, R. & Densley, J. (in press). Deficit or credit? A comparative, qualitative study of gender agency and female gang membership in Los Angeles and Glasgow. Crime & Delinquency. doi: 10.1177/0011128718794192.

34. Deuchar, R., Miller, J. & Densley, J. (2019). The lived experience of stop and search in Scotland: there are two sides to every story. Police Quarterly, 22 (4), 416–451. doi: 10.1177/1098611119849646.

33. Harding, S. Deuchar, R., Densley, J., & McLean, R. (2019). A typology of street robbery and gang organization: insights from qualitative research in Scotland. The British Journal of Criminology, 59(4), 879–897. doi: 10.1093/bjc/azy064.

32. Densley, J., McLean, R., Deuchar, R. & Harding, S. (2019). Progression from cafeteria to à la carte offending: Scottish organised crime narratives. The Howard Journal of Crime and Justice, 58(2), 161–179. doi: 10.1111/hojo.12304.

31. Densley, J. & Pyrooz, D. (2019). A signaling perspective on disengagement from gangs. Justice Quarterly, 36(1), 31–58. doi: 10.1080/07418825.2017.1357743.

30. Robinson, G., McLean, R., & Densley, J. (2019). Working county lines: child criminal exploitation and illicit drug dealing in Glasgow and Merseyside. International Journal of Offender Therapy and Comparative Criminology, 63(5), 694–711. doi: 10.1177/0306624X18806742.

29. McLean, R., Deuchar, R., Harding, S. & Densley, J. (2019). Putting the ‘street’ in gang: place and space in the organization of Scotland’s drug selling gangs. The British Journal of Criminology, 59(2), 396–415. doi: 10.1093/bjc/azy015.

28. Van Hellemont, E. & Densley, J. (2019). Gang glocalization: how a global mediascape creates and shapes local gang realities. Crime, Media, Culture, 15(1), 169–189. doi: 10.1177/1741659018760107.

27. Peterson, J. & Densley, J. (2018). Is Crisis Intervention Team (CIT) training evidence-based practice? A systematic review. Journal of Crime and Justice, 41(5), 521–534. doi: 10.1080/0735648X.2018.1484303.

26. Eckberg, D., Densley, J. & Dexter, K. (2018). When legend becomes fact, tweet the legend: information and misinformation in the age of social media. Journal of Behavioral and Social Sciences, 5(3), 148–156. ISSN: 2375-8899.

25. McLean, R., Robinson, G. & Densley, J. (2018). The rise of drug dealing in the life of the North American street gang. Societies, 8(3), 90. doi: 10.3390/soc8030090.

24. Lauger, T. & Densley, J. (2018). Broadcasting badness: violence, identity, and performance in the online gang rap scene. Justice Quarterly, 35(5), 816–841. doi: 10.1080/07418825.2017.1341542.

23. Densley, J., McLean, R., Deuchar, R. & Harding, S. (2018). An altered state? Emergent changes to illicit drug markets and distribution networks in Scotland. International Journal of Drug Policy, 58, 113–120. doi: 10.​1016/​j.​drugpo.​2018.​05.​011.

22. Johnson, A. & Densley, J. (2018). Rio’s new social order: how religion signals disengagement from prison gangs. Qualitative Sociology, 41(2), 243–262. doi: 10.1007/s11133-018-9379-x.

21. Pyrooz, D. & Densley, J. (2018). On public protest, violence, and street gangs. Society, 55(3), 229–236. doi: 10.1007/s12115-018-0242-1.

20. McLean, R., Densley, J. & Deuchar, R. (2018). Situating gangs within Scotland’s illegal drugs market(s). Trends in Organized Crime, 21(2), 147–171. doi: 10.1007/s12117-017-9328-1.

19. Densley, J. & Peterson, J. (2018). Group aggression. Current Opinion in Psychology, 19, 43–48. doi: 10.1016/j.copsyc.2017.03.031.

18. Densley, J., Hilal, S., Li, S. & Tang, W. (2017). Homicide-suicide in China: an exploratory study of characteristics and types. Asian Journal of Criminology, 12(3), 199–216. doi: 10.1007/s11417-016-9238-1.

17. Storrod, M. & Densley, J. (2017). ‘Going viral’ and ‘Going country’: the expressive and instrumental activities of street gangs on social media. Journal of Youth Studies, 20(6), 677–696. doi: 10.1080/13676261.2016.1260694.

16. Hilal, S., Densley, J. & Jones, D. (2017). A signaling theory of law enforcement hiring. Policing & Society, 27(5), 508–524. doi: 10.1080/10439463.2015.1081388.

15. Peterson, J. & Densley, J. (2017). Cyber violence: what do we know and where do we go from here? Aggression and Violent Behavior, 34, 193–200. doi: 10.1016/j.avb.2017.01.012.

14. Whittaker, G., Norton, J., Densley, J. & Bew, D. (2017). Epidemiology of penetrating injuries in the United Kingdom: a systematic review. International Journal of Surgery, 41, 65–69. doi: 10.1016/j.ijsu.2017.03.051

13. Densley, J., Adler, J., Zhu, L. & Lambine, M. (2017). Growing Against Gangs and Violence: findings from a process and outcome evaluation. Psychology of Violence, 7(2), 242–252. doi: 10.1037/vio0000054.

12. Densley, J. (2016). 街头帮派中的性暴力和性剥削 [Sexual violence and child exploitation in street gangs; translation by Ni Fe]. 青少年犯罪问题 [Issues on Juvenile Crime and Delinquency], 35(3), 114–120. doi: CLI.A.1213760.

11. Pyrooz, D. & Densley, J. (2016). Selection into street gangs: signaling theory, gang membership, and criminal offending. Journal of Research in Crime and Delinquency, 53(4), 447–481. doi: 10.1177/0022427815619462.

10. Grund, T. & Densley, J. (2015). Ethnic homophily and triad closure: mapping internal gang structure using exponential random graph models. Journal of Contemporary Criminal Justice, 31(3), 354–370. doi: 10.1177/1043986214553377.

9. Densley, J. & Stevens, A. (2015). ‘We'll show you gang’: the subterranean structuration of gang life in London. Criminology & Criminal Justice, 15(1), 102–120. doi: 10.1177/1748895814522079.

8. Densley, J., Cai, T. & Hilal, S. (2014). Social dominance orientation and trust propensity in street gangs. Group Processes & Intergroup Relations, 17(6), 763–779. doi: 10.1177/1368430214533161.

7. Densley, J. (2014). It’s gang life, but not as we know it: the evolution of gang business. Crime & Delinquency, 60(4), 517–546. doi: 10.1177/0011128712437912.

6. Hilal, S., Densley, J., Li, S. & Ma, Y. (2014). The routine of mass murder in China. Homicide Studies, 18(1), 83–104. doi: 10.1177/1088767913505092.

5. Hilal, S., Densley, J. & Zhao, R. (2013). Cops in college: police officers’ perceptions of formal education. Journal of Criminal Justice Education, 24(4), 461–477. doi: 10.1080/10511253.2013.791332.

4. Densley, J. (2012). Street gang recruitment: signaling, screening and selection. Social Problems, 59(3), 301–321. doi: 10.1525/sp.2012.59.3.301.

3. Grund, T. & Densley, J. (2012). Ethnic heterogeneity in the activity and structure of a black street gang. European Journal of Criminology, 9(4), 388–406. doi: 10.1177/1477370812447738.

2. Densley, J. (2012). The organisation of London’s street gangs. Global Crime, 13(1), 42–64. doi: 10.1080/17440572.2011.632497.

1. Densley, J. (2011). Ganging up on gangs: why the gang intervention industry needs an intervention. British Journal of Forensic Practice, 13(1), 12–23. doi: 10.5042/bjfp.2011.0046.

Reference Works

Densley, J. (2019). Crips. In R. D. Morgan (Ed.), The SAGE encyclopedia of criminal psychology (pp. 331–335). Thousand Oaks, CA: Sage.

Densley, J. (2018). Gang joining. Oxford research encyclopedia of criminology and criminal justice. Oxford University Press. doi: 10.1093/acrefore/9780190264079.013.437.

Densley, J. (2018). The path less traveled: path analysis and the psychology of gang members. SAGE Research Methods Cases, 2. doi: 10.4135/9781526431660.

Densley, J. (2017). Street gangs. Reference module in neuroscience and biobehavioral psychology. doi: 10.1016/B978-0-12-809324-5.05181-6.

Book Chapters

Densley, J. (in press). Collective violence online: when street gangs use social media. In C. A. Ireland, J. L. Ireland, M. Lewis & A. C. Lopez (Eds.), International handbook on collective violence: current issues and perspectives. Abingdon, UK: Routledge.

Densley, J. (in press). Ganging up on gangs revisited. In Ellis, A. & Marques, O. (Eds.), Thug criminology: an introduction. Toronto, ON: University of Toronto Press.

Lauger, T., Densley, J. & Moule, R. (2019). Social media, strain, and technologically-facilitated gang violence. In A. Bossler & T. Holt (Eds.), The Palgrave handbook of international cybercrime and cyberdeviance. Cham, Switzerland: Palgrave Macmillan.

Densley, J. (2018). ‘A citadel of crime’: St. Paul, Minnesota, and the O’Connor system. In J. Windle, J. Morrison, A. Winter, & A. Silke (Eds.), Historical perspectives on organised crime and terrorism (pp. 17–36). Abingdon, UK: Routledge.

Irwin-Rogers, K., Densley, J. & Pinkney, C. (2018). Gang violence and social media. In J. L. Ireland, P. Birch, & C. A. Ireland (Eds.), The Routledge international handbook of human aggression: Current issues and perspectives (pp. 400–410). Abingdon, UK: Routledge.

Densley, J. & Peterson, J. (2016). Aggression between social groups. In B. J. Bushman (Ed.), Aggression and violence: A social-psychological perspective (pp. 275–289). New York: Routledge.

Densley, J. & Jones, D. (2016). Pulling levers on gang violence in London and St. Paul. In C. Maxson & F-A. Esbensen (Eds.), Gang transitions and transformations in an international context (pp. 291–305). Cham, Switzerland: Springer.

Densley, J. (2015). Joining the gang: a process of supply and demand. In S. H. Decker & D. C. Pyrooz (Eds.), The handbook of gangs (pp. 235–256). Hoboken, NJ: Wiley.

Densley, J., Davis, A. & Mason, N. (2013). Girls and gangs: preventing multiple perpetrator rape. In M. Horvath & J. Woodhams (Eds.), Handbook on the study of multiple perpetrator rape: A multidisciplinary response to an international problem (pp. 255–281). Abingdon, UK: Routledge.

Trade Journals

Densley, J., Sethuraju, R. & Waddell, C. (2019, March 13). Using documentary film to examine implicit bias, procedural justice, and racial reconciliation. Police Chief.

Densley, J. & Stevens, A. (2017). Gang talk: fact and fiction in London street gang careers. Sociology Review, 26(3), 8–10.

Hilal, S. & Densley, J. (2015). The right person for the job: police chiefs discuss the most important commodity in law enforcement. FBI Law Enforcement Bulletin, 84(10).

Green, J. & Densley, J. (2014). Pell Grant fraud awareness: White collar crime challenges. FBI Law Enforcement Bulletin, 83(2).

Hilal, S. & Densley, J. (2013). Higher education and local law enforcement. FBI Law Enforcement Bulletin, 82(5).

Hilal, S., & Densley, J. (2012). Is law enforcement prepared for the new normal of protest? Minnesota Police Chief, 32(4), 19–22.

Densley, J. (2012). Gangs: cross-cultural comparisons. Minnesota Police Chief, 32(1), 17–18.

Densley, J. & Mason, N. (2011). The London riots: a gang problem? Policing Today, 17(2), 14–15.

Davis, A., & Densley, J. (2011). Life cycle. Police Review, 119(6146), 16–17.

Davis, A., & Densley, J. (2011). Gang warfare. Police Review, 119(6145), 16–17.

Densley, J. (2011). The undercover corporation. Exposition, 7, 4–8.

Mason, N., Densley, J., & Davis, A. (2011). Children killing children. Policing Today, 17(1), 15–17.

Densley, J., & Mason, N. (2010). Growing against gangs. Pennant, 153(1), 31–2.


Peterson, J. & Densley, J. (2019). The Violence Project database of mass shootings in the United States, 1966-2019. St. Paul, MN: The Violence Project.

Densley, J. & Peterson, J. (2017). Gun violence in America. St. Paul, MN: The Violence Project LLC.

Book Reviews

Densley, J. (2016). Review of the book The history of street gangs in the United States: Their origins and transformations, by J. C. Howell. Criminal Law and Criminal Justice Books, 6(1).

Densley, J. (2015). Review of the book The social order of the underworld: How prison gangs govern the American penal system, by D. Skarbek. Global Crime, 16(2), 162–165. doi: 10.1080/17440572.2014.999453.

Densley, J. (2014). Review of the book The gang and beyond: Interpreting violent street worlds, by S. Hallsworth. Criminology & Criminal Justice, 14(3), 368–370. doi: 10.1177/1748895814531866.