A MOM allegedly killed her three kids with “extreme atrocity and cruelty” using exercise bands, prosecutors say – as her husband’s horror 911 call is revealed.

Lindsay Clancy, 35, is accused of strangling little Cora, 5, Dawson, 3, and eight-month-old Callan to death at their Massachusetts home.

Prosecutors revealed new evidence they claim proves Lindsay’s actions were deliberate in several new motions filed on Thursday ahead of her trial.

The trial is scheduled to begin on July 20.

They have also asked that a 911 call from the children’s father, Patrick Clancy, be allowed to be introduced as evidence.

“His statements describe the defendant’s condition when she was found, what the scene looked like, what her injuries were, the status of her injuries and how quickly the police responded to the scene,” prosecutors said.

Patrick returned to his Duxbury home on the night of January 24, 2023, where he allegedly found all three of his children with exercise bands around their necks.

His blood-curdling 911 call was revealed in court documents – with the horrified parent allegedly crying to police as they arrived at the scene: “She killed the kids!”

The husband also found his wife Lindsay injured outside the property when he came home, having reportedly jumped from the second-story window.

Patrick is understood to have already been on the phone to cops to alert them of his wife’s wounds when he discovered his three dead children.

The exercise bands had been removed from their necks when police arrived, court docs say.

Lindsay, who was left paralysed from her jump, is now facing two counts of murder, three counts of strangulation and three counts of assault and battery with a dangerous weapon.

She has pleaded not guilty – with her lawyers arguing she had been battling postpartum psychosis at the time.

But prosecutors say Patrick’s chilling call with cops is crucial to proving that Lindsay, a former nurse, acted with “extreme atrocity and cruelty” during the alleged killing.

In the skin-crawling call, Patrick explains how he found the exercise bands still wrapped around the children’s necks, adding that they were easy to take off.

Prosecutors said: “The spontaneous and excited nature of the 911 call, made prior to any reflective thought, further established that the bands were wrapped around each child’s neck in a fashion that negates any theory that they were tied or knotted.

“He further states he believed the bands were looped like you would tie a shoelace, but came off quickly.”

By the time first responders arrived on the scene, each band was “lying next to each child,” according to court documents.

Prosecutors said the “brief time between finding each child and the fact that Mr Clancy was able to remove each band so quickly” disproves any theory that Lindsay may have tied a knot around each neck before walking off.

It is instead alleged that Lindsay “manually pulled the bands around each child’s neck until they died.”

This showed the “deliberateness of her acts and the extreme atrocity and cruelty of her acts,” prosecutors argued.

Lindsay’s lawyers have agreed that she allegedly murdered her children – but have argued that she was over-medicated at the time and suffering from severe postpartum psychosis.

Lindsay’s claim to have been suffering from insanity may be helped by a lawsuit Patrick filed in January which accused his wife’s doctors of “misprescribing” a cocktail of “powerful medications” that made her mental health much worse.

The claims were made against Dr Jennifer Tufts, nurse Rebecca Jollotta, Aster Mental Health Inc, and South Shore Health System.

The lawsuit alleges that from September 2022 to January 2023, Lindsay suffered from depression and was prescribed several psychiatric drugs.

These included antidepressants, mood stabilizers, and benzodiazepines, it is claimed.

Her supposed over-medication and doctors’ insufficient oversight on her condition allegedly led to her children’s deaths, the lawsuit claims.

It says: “If [the doctors] had not acted negligently, and rather had provided adequate care, it is more likely than not that Patrick and Lindsay’s children would still be alive today.”

The medication she was given caused paranoia, suicidal thoughts, and a fear of being alone, her lawyers claim.

On the other hand, prosecutors have alleged that Lindsay deliberately sent her husband out of the home on the night of the alleged killings.

They claimed she convinced him to run some errands so that she would have time to murder the children.

Prosecutors also argued that she was not suffering from postpartum depression – instead claiming she used her phone to look up killing methods in the days leading up to her children’s deaths.