INDIANAPOLIS—The former employee who shot and killed eight people at an Indianapolis FedEx warehouse in April acted alone and was not racially or ethnically motivated, authorities said Wednesday. Brandon Scott Hole, 19, used the April 15 attack as an act of “suicidal murder” and believed he would “demonstrate his masculinity and capability” while fulfilling a final desire to experience killing people, Indianapolis police and federal authorities said during a news conference. Eight employees, including four members of the city’s Sikh community, were killed in the attack and five others were injured, police said. Police said Hole considered other locations for the shooting but chose the FedEx building because it was familiar to him. He also believed the site would give him access to a large number of vulnerable victims. Paul Keenan, special agent in charge of the FBI’s Indianapolis field office, declined to disclose other potential targets. “He knew the …