Gregory Lee Fish, 59, was killed at his home in Wetumka, Oklahoma on November 5, 2019. The death was investigated as a homicide by the Oklahoma State Bureau of Investigation after authorities arrested Gregory’s 28-year-old grandson, Joshua Gann, at the scene.

Reports say Joshua had been diagnosed with schizophrenia at 16 and was described as being in a fragile mental state that night. Family tensions reportedly escalated when Gregory, who had been drinking, emotionally provoked his grandson; the confrontation ended in violence that resulted in Gregory’s death. Joshua was taken into custody and charged with first-degree murder.

What details about the confrontation or the events leading up to it could help clarify what happened that night?