The Pensacola Police Department says a man wanted for an attempted murder in April has been arrested. Ralph Waldo Emerson was taken into custody by members of the U.S. Marshals Task Force in Los Angeles. Police say Emerson stabbed a man on Dunwoody Drive in Cordova Park back on April 10th. The unidentified victim was critically injured and has since undergone numerous surgeries. Emerson will be extradited back to Pensacola.