A cold-blooded Brooklyn man was found guilty of fatally shooting his ex-girlfriend point-blank in the head as she pushed their three-month-old baby girl in a stroller. 

Isaac Argro, 26, was convicted of murder in Manhattan court on Thursday – four years after he put a bullet through 20-year-old Azsia Johnson’s temple during the Upper East Side attack on June 29, 2022. 

After a weeks-long trial, the jury found Argro guilty of the heinous crime within two hours of deliberation, according to Manhattan District Attorney Alvin Braggs.

“He just sat there and lied,” Johnson’s grief-stricken mother Lisa DeSort told The Post Saturday. 

“I can’t believe the lies that came out of his mouth just to protect himself, knowing what he did.” 

DeSort was stunned by the killer’s pompous courtroom attitude and blatant lack of remorse. 

Johnson’s older sister, Destiny Johnson, even caught the creep laughing “as if he was going to get away with it,” she said. 

Argro tried to pawn the murder off on what he described as a rocky childhood and even friends he claims he lost from gun violence, DeSort said. 

“We’re supposed to feel bad?” she passionately recalled. 

“How dare you come up there and say that’s the reason you did what you did?” 

DeSort stared Argro down when she took the stand – but he refused to look her in the eye. 

In spite of the heartache of the last four years without her daughter – an aspiring pediatric nurse who adored her family and children – DeSort is over the moon that justice has finally been served. 

“I’m very satisfied with the jury. They were fair, they had an open mind. DA [Bragg] did an awesome job,” she reflected.

“[Argro] deserves every bit of what he gets.” 

Johnson was terrified of Argro and had been living in an East Harlem domestic violence shelter to protect herself, the infant and her older child — who she had in a previous relationship — from his wrath. 

Argro, who DeSort once described as a rage-filled wannabe gangster, stalked and abused Johnson, who filed multiple police reports against him. 

But her family said she wanted to make sure her daughter had a relationship with her dad, so she agreed to meet up with him. 

It was only the second time Argro laid eyes on his young child when he murdered Johnson.

The twisted killer fled the scene and was arrested two days later.

“Argro subjected Azsia Johnson to extensive physical and emotional abuse before she finally had the immense bravery to leave him in order to protect herself and her children,” Bragg said. 

“She was a loving mother who was determined to give coparenting a try, despite Argro’s ongoing campaign of harassment.”

DeSort said she never trusted Argro and did everything to pull her daughter out of his clutches. 

She pointed to an incident where he came over to their home and started screaming at Johnson for no reason. 

“I texted her, ‘He has to go. He can’t be here. He can’t come to my house and think he’s going to argue with you in your house,’” she said. 

In another chilling incident, when Johnson was about two months pregnant, Argro joined them on a family getaway to Connecticut. 

“He looks at my daughter and said “make me a f–king sandwich,” DeSort said.

“I looked at him and said ‘Make your own f–king sandwich.'”

Out of sheer terror, Johnson contemplated aborting their baby. 

Johnson purchased abortion pills, but when it came time to take them, she couldn’t bring herself to do it. 

“We both started crying. We just threw the pills out,” DeSort recalled. 

DeSort, a mother of 10, has devoted her life to raising awareness about domestic violence in order to honor her daughter. 

A survivor of DV herself, DeSort now works at a woman’s shelter to help other women break the horrific cycle of abuse. 

“Domestic violence and abuse is not limited to one person, or one race, it’s widespread,” she warned. 

“I just want to help somebody else.”

Argro is due back in court June 18 for sentencing.

His lawyer did not immediately respond to a request for comment. 

“I think about her all the time, every day I say good morning,” Destiny Johnson said. 

“I just miss her. I miss her every day.”