In 1936, Celestino Gonzalez took an axe and murdered his wife and his six children. Then, he murdered a coworker before killing himself.
Sources--
www.newsweek.com/inside-mind-family-annihilators-75225
The Times. 10 July 1936. Munster, Indiana.
Muncie Evening Times. 10 July 1936. Muncie, Indiana.
The South Bend Tribune. 10 July 1936. South Bend, Indiana.
The Times, 11 July 1936. Munster, Indiana.