49-year-old Tommy Lynn Sells was executed last week in Texas.
Sells was convicted for a murder in Texas. He also confessed to the 1997 murder of 10-year-old Joel Kirkpatrick south of Lawrenceville, IL.
Other confessions included the slaying of an Illinois family in 1987.
Those victims included Ruby Dardeen, who was eight months pregnant. Her fatal beating forced her to prematurely give birth.
The newborn was killed along with her 3-year-old sibling.
And although Sells never actually confessed, an affidavit filed by private investigator William Clutter identified Sells as a serial killer responsible for the murder of Dyke and Karen Rhoads of Paris.