An argument between a husband and wife turned tragic Sunday afternoon when she tried to drive away but ran over and killed him instead, authorities said. The Pinellas County Sheriff's Office said late Sunday that its investigation so far has found it appears to have been an accident. It started around 1:35 p.m. at the Roosevelt Manor Mobile Home Park at 5250 Roosevelt Boulevard near Clearwater. Deputies said the couple had been arguing. Joyce Khoshaba, 46, got into a 1990 Dodge Dynasty to leave, the Sheriff's Office said. As she started the car, Ushana Khoshaba, 54, stepped in front. Joyce Khoshaba thought the car was in reverse when she stepped on the accelerator, the Sheriff's Office said. She struck her husband, who was declared dead on the scene.