Mysterious note found in pocket of terminally ill grandmother after she executed her son's ex-girlfriend while she was loading baby into car in horror murder-suicide ambush

A mysterious note was found in the pocket of a grandmother who executed her son's ex-wife as she was loading her baby into a car before turning the gun on herself.

Kathleen Leigh, 65, fatally shot her former daughter-in-law Marisa Galloway, 45 in New York City amid a bitter custody dispute, police said.

Galloway was placing one of her daughters, aged one, into her vehicle during a custody swap when Leigh shot her in the head and back before taking her own life.

Now it has emerged that Leigh, who was terminally ill, was carrying a note which read 'For Police', the New York Post reports.

The contents of the note were not immediately made clear.

A mysterious note was found in the pocket of a grandmother who executed her son's ex-wife Marisa Galloway (pictured) as she was loading her baby into a car before turning the gun on herself.

A mysterious note was found in the pocket of a grandmother who executed her son's ex-wife Marisa Galloway (pictured) as she was loading her baby into a car before turning the gun on herself.

Galloway has been battling for custody of her four-year-old child with Leigh's son, the father of the child, since 2021. The one-year-old has a different father.

The late mother had a history of domestic violence disputes with her partner related to the custody battle, said NYPD's chief of detectives Joseph Kenny. 

Five reports and two complaints had been filed with the NYPD between July 2021 and November, but no arrests were made.

Leigh was pronounced dead at the scene. Galloway was rushed to the hospital, where life saving efforts were made, but she ultimately succumbed to her wounds.  

Two guns were recovered at the crime scene - a 9-millimeter gun from the sidewalk and another gun in the tote bag leigh had on her. Police are trying to confirm whether or not Leigh had owned the firearms during her time as a probation officer.

Her family have since paid tribute to Galloway, saying her  'kindness, generosity, and love were unparalleled'.

'She devoted her whole life to her two beautiful daughters, Lili and Mariel...they were her world,' a statement on a GoFundMe states.

Galloway, 45, (pictured) was loading her one-year-old child into a car seat in the back of a parked car when her ex mother-in-law, Kathleen Leigh, 65, shot her in the head. She then killed herself by shooting herself in the head

 Galloway, 45, (pictured) was loading her one-year-old child into a car seat in the back of a parked car when her ex mother-in-law, Kathleen Leigh, 65, shot her in the head. She then killed herself by shooting herself in the head

Galloway has been battling custody of her four-year-old child with Kathleen's son, the father of the child, since 2021. The one year old does not belong to Leigh's son

'Marisa's untimely passing will leave a void in all of our lives. But her memory will live on in her daughters and in all of our hearts. '

Police were called to the apartment, located steps away from Mayor Adam's residence, the Gracie Mansion, in the Yorkville - a neighborhood that has a reputation for being generally safe and quiet - just before 9 am.

The 911 caller reported hearing three gunshots, then looking out the window to see two women lying on the ground in a pool of their own blood.

First responders said Galloway was still breathing when they arrived, but was pronounced dead at the hospital.

Leigh was a retired probation officer from Chicago, and had moved in with her son in their Upper East Side apartment three years ago.

Sources told the New York Post that Leigh had terminal cancer and had been undergoing treatment while living with her son in his doorman building.

The neighbors have been in the know about Galloway and Leigh's ongoing feud.

'She always talked about the fact that she had a former [partner] that was harassing the hell out of her because I had child services at my door one evening asking if I had ever heard any problems next door,' said Galloway's neighbor Meryl Feidelman.

Galloway has been battling custody of her four-year-old child with Kathleen's son, the father of the child, since 2021. The one year old does not belong to Leigh's son

The late mother had a history of domestic violence disputes with her former partner related to the custody battle, said NYPD's chief of detectives Joseph Kenny. Pictured: A gun recovered at the scene

The late mother had a history of domestic violence disputes with her former partner related to the custody battle, said NYPD's chief of detectives Joseph Kenny. Pictured: A gun recovered at the scene

Five reports and two complaints had been filed with the NYPD between July 2021 and November, but no arrests were made. Leigh was pronounced dead at the scene

'I said, 'No, no she's a lovely, lovely mother, a lovely woman.'

Leigh allegedly believed Galloway to be abusive, as several of the reports included complaints from the four-year-old's father, claiming that his daughter would arrive home with bruises on her arm, but investigators found the accusations unfounded.

But residents in the building suggest otherwise, as a neighbor told the New York Post that the mother showed no signs of a cancer diagnosis, and often told others in the building that she thought Galloway was an abuser.

'She used to say things to me like the mother is abusing the child,' the neighbor said, 'which I don't think there was any evidence of that.'

'But I know she did not like the ex-daughter-in-law.'

Her family have since paid tribute to Galloway, saying her 'kindness, generosity, and love were unparalleled'

Her family have since paid tribute to Galloway, saying her 'kindness, generosity, and love were unparalleled'

Sources told the New York Post that the father had custody Friday through Monday, while Galloway had their daughter Tuesday through Thursday.

NYPD investigators reportedly entered the apartment and walked out with a cardboard box of items.

The investigation is still ongoing. No arrests have been made.