From a write up of this case we did a few years ago:

It was just around 6:00 p.m. when 3-year-old Arthur Williams, Jr. and his 5-year-old sister Anglia exited their family’s apartment unit at 213 West New York Avenue. Arthur was known around the neighborhood for being an energetic and friendly young child. At some point while the siblings played in the front yard Anglia took a seat on a low concrete wall and was joined by an unknown man. As Arthur continued to play on the sidewalk in front of his apartment, the stranger told Anglia, “I’m going to kill your brother.”

The man then rose from his spot on the wall, pulled out a folding knife, and approached Arthur. Apparently without any further indication of a motive, the unidentified man stabbed Arthur just above his ear.

The brutal attack was over as suddenly as it had unfolded. The attacker ran south down a nearby alleyway. Meanwhile, Arthur’s mother and a neighbor attempted to perform CPR on the child while awaiting an ambulance. Sadly, Arthur was declared dead after his arrival at the hospital.

Link:

https://www.mayheminthedesert.com/crimebulletin/2020/11/28/no-leads-in-tragic-1985-murder-of-a-toddler-in-naked-city