Christian Johnson, a 19-year-old African American man, was killed on December 11, 2018, in his home in the 6300 block of Ivy Knoll in Houston. Mohamad Nour Alajil, then 18 and described as of Syrian descent, allegedly pointed a semi-automatic pistol at Christian’s head and pulled the trigger, causing a fatal wound to the head.

Investigators say Alajil first told police he shot Christian during a fight and claimed self-defense; witness statements reportedly contradicted that account and Alajil later admitted they were playing the challenge. Alajil was charged with second-degree manslaughter. Christian’s family, including his sister Shyra Estes-Johnson, disputed the challenge explanation and urged authorities to pursue a first-degree murder charge. Christian was a senior at Sharpstown High School and active in Young Life; family and friends held vigils and memorials in his memory.

Does anyone have information about the events at the Ivy Knoll home on December 11, 2018, or knew Christian and can help fill gaps in the timeline?