From The Yo-Yo Man: With A Vengeance Department:

Amar Shreiteh, a convenience store clerk from Fort Pierce, Florida, stabbed a fourteen year-old boy for playing with a yo-yo. The boy put down the yo-yo and Shreiteh demanded he pay for it. When the boy refused, Shreiteh pulled the boy behind the counter and stabbed him with a butcher knife. As if I needed another reason to stay out of Florida! (WYFF4.com via Obscure Store)