Q. Who was the first individual killed by God for being wicked? Who was he/she or what scripture can this be found in?
A. The first individual mentioned in the Bible put to death specifically due to his wickedness was the first one to perish in the flood. Millions of others soon followed. Genesis 6:5 gives man’s wickedness as the cause of the Great Flood.
The next occasion is from Genesis 13 and involved all the inhabitants of Sodom and Gomorrah.
The first man identified by name was Er, the first born son of Judah (Genesis 38:7)