Did YOU read the article? These are the laws in these states that specifically state what the aggravating circumstance is.

Table 1. States Authorizing the Death Penalty for Killing a Child State Child-Victim Aggravating Circumstance

Arizona

The defendant was an adult at the time the offense was committed or was tried as an adult and the murdered person was under fifteen years of age or was seventy years of age or older

Arkansas

The capital murder was committed against a person whom the defendant knew or reasonably should have known was especially vulnerable to the attack because the person was 12 years of age or younger

Connecticut (prior to abolition)

Murder of a person under 16 years of age

Delaware (prior to abolition)

The victim was a child 14 years of age or younger, and the murder was committed by an individual who is at least 4 years older than the victim

Florida

The victim of the capital felony was a person less than 12 years of age

Illinois (prior to abolition)

The murdered individual was under 12 years of age and the death resulted from exceptionally brutal or heinous behavior indicative of wanton cruelty

Indiana

The victim of the murder was less than 12 years of age

Louisiana

The victim was under the age of 12 years

Nevada

The murder as committed upon a person less than 14 years of age

New Jersey (prior to abolition)

The victim was less than 14 years old

Ohio

The offender in the commission of the offense, purposefully caused the death of another who was under thirteen years of age at the time of the commission of the offense and the defendant committed the offense with prior calculation and design

Oregon

The victim of the intentional homicide was under the age of 14 years old

Pennsylvania

The victim was a child under 12 years of age

South Carolina

The murder of a child 11 years or younger

South Dakota

The offense was outrageously or wantonly vile, horrible, or inhuman in that it involved torture, depravity of mind, or an aggravated battery to the victim. Any murder is wantonly vile, horrible, and inhuman if the victim is less than thirteen years of age

Tennessee

The murder was committed against a person less than 12 years of age and then defendant was 18 years of age or older

Texas

The person murders an individual under 10 years of age

Virginia (prior to abolition)

Murder victim was under the age of 14 and the defendant was 21 years of age of older

Wyoming

The defendant knew or reasonably should have known the victim was less than 17 years of age