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Case Description
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Ronald Dean Mosser, a 7-year-old boy from Joplin, Missouri, tragically lost his life on January 2, 1951. His death was part of a horrific crime spree committed by William Edward "Billy" Cook Jr., a notorious spree killer. Cook's crime spree began in late December 1950 and spanned multiple states, including Missouri and California.

On December 30, 1950, Cook kidnapped a motorist in Texas, marking the start of his violent rampage. Shortly after, he encountered the Mosser family, who were tr ...Read More
Victim Details

Ronald Dean Mosser

Male

White / Caucasian

Joplin

MO

1951-01-02

7

Ronald

Dean Mosser

12/28/2025