ATLANTA—A man already sentenced to life in prison after pleading guilty to fatally shooting four people at a massage business outside Atlanta pleaded not guilty to shooting four others on the same day at two spas inside the city. Robert Aaron Long, 22, appeared briefly Tuesday in Fulton County Superior Court, where he waived arraignment and entered a not guilty plea on charges including murder, aggravated assault, and domestic terrorism. District Attorney Fani Willis is seeking the death penalty, as well as a sentencing enhancement under Georgia’s new hate crimes law. In July, Long pleaded guilty in Cherokee County to charges including four counts of murder. He received four sentences of life without parole plus an additional 35 years. Those killed in Cherokee County were: Paul Michels, 54; Xiaojie “Emily” Tan, 49; Daoyou Feng, 44; and Delaina Yaun, 33. The Atlanta victims were: Suncha Kim, 69; Soon Chung Park, 74; …