LINCOLN, Neb. (AP) – Authorities say a man shot and killed a woman in a Lincoln apartment before turning the gun on himself.  Lincoln police say a witness reported seeing the man shoot the woman with a shotgun during an argument just before 7 p.m. Saturday. That’s when the witness fled the apartment and called 911.  Police say officers arrived to find both the man and the woman dead.  The man died of a gunshot wound to the head.  Their names have not been released.  No other suspects are being sought.