OMAHA, Neb. (AP) – Omaha police have arrested a third person in connection with the shooting death of a man last week.  Omaha television station KETV reports that 20-year-old Nicholas Ely was arrested Tuesday in Omaha.  He is suspected of playing arole in the July 6 shooting death of 25-year-old Kristopher Winters.  Police say they are still looking for another man believed to have been involved in the shooting.  Ely is still in custody, and court records show no attorney yet assigned to him.  Last week, police arrested 21-year-old Marqus Patton, of LaVista, on suspicion of first-degree murder and a weapons count.  A 15-year-old Omaha girl also has been charged as an adult with first-degree murder in Winters’ death.