Police said Friday that federal marshals and local police arrested 19-year-old Covarrubias Saturnino in Sioux City, Iowa.
Earlier this week, Omaha police arrested 37-year-old Antwan Lovejoy on charges of first-degree murder and two weapons counts.
Officers responded around 6 a.m. Sunday to investigate a report of shots fired at the store. They found 27-year-old Andrew Peek lying between gas pumps suffering from a gunshot wound. Peek later died at Nebraska Medical Center.
Police say store surveillance video shows Lovejoy shooting Peek and then Lovejoy and Saturnino fleeing in Peek’s car.