A Cold Case is one that has gone unsolved for years. However, homicide cases are never truly cold, for detectives constantly work cases until they are officially closed. Case in point is the recent arrest of 60-year-old Nancy Moronez. On Friday (Feb. 23), Moronez, a resident of Oshkosh, Wisconsin, confessed to police that she was responsible for three homicides [VIDEO] between 1980 and 1985. A report by FOX News provided most of the information used in this article.

All of Moronez's victims were infants. The first to die was Moronez's son, a two-week-old boy who expired in March 1980. The next victim, a six-month-old boy, died in 1984.

A year later, a two-month-old girl passed away. One of the victims died in the city of Franklin, while the other two died in Milwaukee. In all three cases, the deaths were officially listed as the result of Sudden Infant Death Syndrome, or SIDS.

According to police investigators, the first time that Moronez was mentioned as a suspect in these crimes was in 2015. At that time, her own daughter contacted police in Waukesha, Wisconsin in order to report that her mother had admitted to killing her own son in 1980 with a Garbage Bag. The other two victims were also smothered to death by Moronez. Moronez would later tell investigators that she drowned her son in a bathtub rather than smother him with a garbage bag.

Babysitter nightmare

The deaths in 1984 and 1985 occurred because Moronez claims that she grew "frustrated" with the two infants.

At the time of the crimes, Moronez was working as a babysitter, and both victims were charged to her care. Milwaukee's FOX 6 has reported that Moronez explained away her last two homicides to investigators by simply saying "I can't take kids that constantly cry."

During the 1984 murder, Moronez used a blanket to suffocate the small child. The next crime almost ended with Moronez being questioned by investigators, for one of the responding firefighters at the scene recognized Moronez from the 1984 case. After this third homicide, Moronez allegedly told her husband that she no longer wanted to work as a babysitter.

Moronez is currently being held on $35,000 bail. She is facing the possibility of three life sentences if convicted. Moronez has supposedly expressed remorse for her crimes.

Horrific echoes

The case of Nancy Moronez bears an eerie similarity to the case of Helen Patricia Moore. Between 1978 and 1980, the Australian teenager killed three members of her own family. In each instance, the deaths of 14-month-old Andrew Stuart, 16-month-old Suzanne Moore, and seven-year-old Peter Moore were blamed on SIDS. After killing Peter, Helen admitted to her mother that she was responsible for all three murders. Despite this confession, Helen Moore would only serve 13 years in prison and was released back into the general population in 1993. During each crime, Moore babysat her victims.