Comic Title: Detective Comics #304
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1962
On Sale Date: April 24, 1962 Newsstand Date April 24, 1962
Source: House Ad, World's Finest Comics #126, Page 13

Newsstand Date April 24, 1962
Source: Newsdealer Magazine, V17 #2

Copyright Date April 24, 1962
Source: Library of Congress, Periodicals 1962

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Jack Schiff

Title: "The Crime College"
Pages: 12

Feature(s):
Martian Manhunter (of Earth-1)

Artist: Joe Certa

Reprinted In:
Showcase Presents:Martian Manhunter Vol. 1 TPB (2007)

Feature Character(s)

• Martian Manhunter (last appearance in Detective Comics #303; next appearance in Justice League of America #12)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #303; next appearance in Detective Comics #306)
• Diane Meade (last appearance in Detective Comics #303; next appearance in Detective Comics #306)

Villain(s)

• Professor Proxon and his students (Wilson, Stuart and Croft named; no further appearances)

Other Character(s)

• Warden Loper (a prison warden; no further appearances)

Synopsis:
Professor Proxon creates a crime college where he instructs criminals of new methods for crime. The students are caught by the Martian Manhunter, so Proxon plots against the alien, learning his weakness of fire. Proxon lures J’onn to the college and uses fire against him. J’onn has already learned of the professor’s plan by infiltrating the school. He sabotages the flamethrower they plan to use on him, then he captures the remaining students and the professor.