WEST PALM BEACH, Fla.—Two psychologists have found a homeless man accused of fatally stabbing a Florida teenager competent to stand trial. Their findings were announced Wednesday by Palm Beach County Circuit Judge Charles Burton, who oversees the court’s mental health division. He said a hearing will be scheduled in the next several weeks so the psychologists can be questioned by prosecutors and the defense lawyers for Semmie Williams. Williams is accused of killing 14-year-old Ryan Rogers on Nov. 15. The teenager went out for a bike ride that evening and never returned home, police said. His body was found the next day alongside an Interstate 95 overpass. Court records show Rogers was stabbed numerous times in the head. The records say Williams’ DNA was found on a pair of headphones at the scene and that Rogers’ blood was found on a bandana Williams had in his backpack when he was …