The confrontation happened Saturday afternoon near Florence and Hooper avenues.
A woman flagged down some sheriff's deputies who were driving by and told them a man had tried to rob her at gunpoint.
She said she ducked down in her vehicle and the suspect fled down Florence Avenue.
The deputies found a man meeting the suspect's description. Officials say he pulled out a gun and the deputies opened fire.
He was brought to a local hospital and pronounced dead. Officials say a gun and knife were recovered at the scene.