Isaac Argro, 22, was arrested and charged with Azsia Johnson’s murder and criminal possession of a weapon, the NYPD said in a tweet, adding that police “will continue to be relentless in their pursuit of justice.” Police investigators at the scene of the fatal shooting of a 20-year-old woman on the Upper East Side of Manhattan on June 29, 2022. Dakota Santiago/The New York Times via Redux Johnson was fatally shot in the head Wednesday on the Upper East Side in what police sources said appeared to be a targeted attack. Johnson was pushing a baby stroller around 8:25 p.m. when a man wearing a black hoodie came up behind and fired shots at close range before fleeing on foot, police said. The baby was unharmed, police said. Before the shooting, Johnson texted a relative saying she planned to meet the father of her baby “to sort things out,” according to police sources. After the shooting, police wanted to speak with the baby’s father but had not initially named him as a suspect, sources said. “We will find this person who is guilty of this horrific crime. We will find him and bring him to justice,” New York City Mayor Eric Adams told reporters Thursday. A 20-year-old woman was killed after being shot in the head while pushing a baby carriage on Manhattan’s Upper East Side, June 29, 2022, in New York. WABC Detectives believe Johnson was living at a women’s shelter in East Harlem, sources said. Friends and family held a vigil for Johnson Thursday at the scene of the shooting, which was near a playground. Johnson also had a 1-year-old son and was an aspiring pediatric nurse, New York ABC station WABC reported. ABC News’ Matt J. Foster contributed to this report.