• His murder helped launch the missing children movement, which included new legislation and new methods for tracking down missing children, and spawned the milk-carton campaigns of the early 1980s.
• He was the first missing child to be pictured on a milk carton.
• Body never found

Just seems odd that his disappearance spawned what is now recognized as a very questionable organization with people like Silsby involved...

Also, curious that they reopened the case. Who made that happen? What did they know?

https://en.m.wikipedia.org/wiki/Disappearance_of_Etan_Patz