Cesar Chavez, age 22, of Houston, Texas, believed a shotgun was unloaded when he fired it.  He struck and killed his 12-year-old nephew, who was playing with a toy gun at the time of the incident. Chavez has been charged with manslaughter.

Source:

Moriah Ballard, “Bond Set at $100K for Uncle Who Discharged Gun at 12-year-old Nephew, Killing Him at NE Houston Home, Police Say,” click2houston.com (October 23, 2022).