Law magazines
- John Hinckley Trial: 1982
- John Marshall Branion Trial: 1968
- John Peter Zenger Trial: 1735
- John S. Williams and Clyde Manning Trials: 1921
- John Thomas Scopes Trial: 1925 (The "Monkey Trial")
- John Wayne and Lorena Bobbitt Trials: 1993 & 1994
- John Wayne Gacy Trial: 1980
- John Wesley Trial: 1737
- Johnny Volpato Trials: 1981 & 1986
- Joseph Zangara Trial: 1933
- Judith Catchpole Trial: 1656
- Justin A. Volpe et al. Trials: 1999 & 2000
- Kenyan and Tanzanian Embassy Bombers Trial: 2001
- Kevin Mitnick Case: 1999
- Kristen Gilbert Trial: 2000-01
- LAPD Rampart Division Trial: 2000
- Len Davis Trial: 1996
- Lenny Bruce Trial: 1964
- Leo Frank Trial: 1913
- Leon Czolgosz Trial: 1901