When did Wineville Chicken Coop Murders die?

The term "Wineville Chicken Coop Murders" refers to the crimes committed by Gordon Stewart Northcott, who murdered several children in the 1920s. However, the term "die" is not usually used in this context. It's more accurate to say:

* Gordon Stewart Northcott was executed by hanging on August 2, 1930.

* The Wineville Chicken Coop Murders were committed between 1926 and 1928.

The term "Wineville Chicken Coop Murders" itself is not a person who died; it's a name for the crimes.