DES MOINES, Iowa (AP) — Another suspect has been arrested in the fatal shooting of man in north Des Moines. Police say 20-year-old Calvonta Stallings was arrested Sunday after a robbery in Davenport. The Polk County charges include first-degree murder and robbery in the slaying of 23-year-old Rashid Ibrahim. Ibrahim was found by officers sent to investigate reports of a shooting. He was pronounced dead at a hospital. Stallings is the fifth person arrested in connection with Oct. 10 shooting of Ibrahim.