Comic Title: Detective Comics #31
Publisher: DC (Detective Comics, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: September 1939
Approx. On Sale Date: August 10, 1939 Copyright Date July 30, 1939
Source: Library of Congress, Periodicals 1939
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Monthly
Cover Price: $0.10
Page Count: 64
Editor: Vincent A. Sullivan

Title: (No Title)
Pages: 13

Feature(s):
Slam Bradley (of Earth-1)

Writer: Jerry Siegel
Artist: Joe Shuster

Feature Character(s)

• Slam Bradley (last appearance in Detective Comics #30; next appearance in Detective Comics #32)

Supporting Character(s)

• Shorty Morgan (last appearance in Detective Comics #30; next appearance in Detective Comics #32)

Villain(s)

• Dugan (a zookeeper; no further appearances)

Other Character(s)

• A photographer and other murder victims (die in this story; no further appearances)

Synopsis:
Slam and Shorty visit the zoo and stop a man from tormenting the animals. The next day the man turns up dead. Slam begins to investigate the case as other murder victims begin turning up around the zoo. When an escaped lunatic is shot by the zookeeper, Dugan, the case appears to be closed. However Shorty suspects the zookeeper and tricks him into confessing. Dugan attempts to kill Shorty too, but Slam arrives in time to save his friend and apprehend Dugan.