ROCK HILL, S.C.—A coroner is set to release test results Tuesday for a degenerative brain disease in the former NFL player suspected of fatally shooting six people in South Carolina before killing himself in April. The family of ex-football pro Phillip Adams agreed shortly after his death to have his brain tested for chronic traumatic encephalopathy, or CTE, the degenerative disease linked to head trauma and concussions that has been shown to cause a range of symptoms including violent mood swings and memory loss. Authorities have said that on April 7, Phillip Adams killed Rock Hill physician Robert Lesslie; his wife, Barbara; two of their grandchildren, 9-year-old Adah Lesslie and 5-year-old Noah Lesslie; and two HVAC technicians working at the Lesslie home, James Lewis and Robert Shook, both 38. Police later found Adams with a self-inflicted gunshot wound to the head. CTE, which can only be diagnosed through an autopsy, …