Codrick Beal McCall Jr., a 4-year-old boy from Houston, Texas, died on March 1, 2015, from a self-inflicted gunshot wound while staying at a family friend’s house where his mother was celebrating her birthday. The shooting happened in the 19000 block of Imperial Stone in north Harris County after Codrick somehow gained access to a loaded handgun in the home.

Authorities including the Harris County Sheriff’s Office and Texas Child Protective Services opened investigations into how the child obtained the firearm, and the matter was referred to a grand jury to consider whether charges should be filed. Family members, including Codrick’s grandmother, described deep heartbreak and said the death could have been prevented if the gun had been secured.

The child’s parents were not at the scene when the shooting occurred. What remains unclear is precisely how Codrick accessed the weapon; anyone with information about the location or circumstances of the firearm that day is asked to come forward.