A 60-year-old woman has been charged the murders of her newborn son and two other babies more than 30 years after their deaths.
Nancy Moronez admitted the killings, which happened between 1980 and 1985 in Wisconsin, say police.
She told officers her two-week-old son drowned in the bath in March 1980, USA Today reports.
She also admitted suffocating a six-month-old boy she was babysitting in 1984 and a two-month-old girl who was also in her care a year later, according to a criminal complaint filed in Milwaukee
The children's deaths were not investigated for decades, with police believing the infants had all suffered from from sudden infant death syndrome.
But in 2015, Moronez's daughter told officers her mother had confessed to suffocating her son more than 30 years before – prompting authorities to discover the connection between the deaths and open an investigation.
Prosecutors say Moronez told a detective she had killed her own child and two others, saying that she "can't take kids that constantly cry".
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While her daughter said Moronez killed her son with a rubbish bag, the accused said she had given the crying child a bath and held him in the water until he was dead, local media reported.
She faces three counts of murder and is now in custody, according to records at the Milwaukee County Sheriff's office.