The babies, a male less than one-month-old, a six-month-old male and a two-month-old female, were originally thought to have died from Sudden Infant Death Syndrome.
According to the criminal complaint, Moronez was interviewed by authorities in 1984 and 1985 about the deaths. In one of the deaths, a firefighter went into the house where the child had died. Moronez was babysitting the child. She walked into the house, pointed and told the firefighter “there it is.”
The firefighter had also responded to one of the other infant deaths, and asked Moronez if she recognized him. Moronez responded, “I told my husband I didn’t want to babysit anymore.”
The case was reopened in 2015 after the Moronez's daughter told Waukesha Police that she admitted to killing a child by suffocating the infant with a black plastic bag.
Moronez admitted to police she killed the three infants in order to get them to stop crying.
“I can’t take kids that constantly cry,” she told police.
The Milwaukee and Franklin Police Departments conducted an investigation on the deaths and on Feb. 20, they took Moronez into custody.