In a case that has quickly shifted from investigation to arrest, the Arlington Police Department has brought 17-year-old Joshua Nunn into custody over the fatal shooting of 18-year-old Jesus Galarza, as reported on Thursday. With the suspect now facing charges of Murder and Aggravated Assault with a Deadly Weapon, his surrender to the Tarrant County Jail marks a somber progression in a story that began as a violent encounter on a quiet neighborhood street.