The NYPD announced Friday that they have arrested Isaac Argro, 22, in the horrifying shooting of 20-year-old Azsia Johnson on Manhattan's Upper East Side earlier this week. Argro was arrested Friday evening and has been charged with murder and criminal possession of a weapon in connection to Johnson's shooting. Johnson was shot in the back of the head and killed as she pushed her 3-month-old baby in a stroller. Her mother had previously alleged that her daughter's ex-boyfriend was abusive and was stalking her after having the child. Johnson had been living in a domestic violence shelter on the Upper East Side when she was gunned down on Wednesday night. The baby was not injured in the shooting. Subscribe to LiveNOW from FOX! https://www.youtube.com/livenowfox?sub_confirmation=1 Where to watch LiveNOW from FOX: https://www.livenowfox.com/ Follow us @LiveNOWFOX on Twitter: https://twitter.com/livenowfox Raw and unfiltered. Watch a non-stop stream of breaking news, live events and stories across the nation. Limited commentary. No opinion. Experience LiveNOW from FOX.