A verdict was announced on the first day of deliberations at the Railroad Park murder trial.   A jury Wednesday found Justin Jones guilty of reckless murder.  Prosecutors say he fired the shot that killed 15-year old Jarmaine Walton.  Jones' lawyer, Charles Salvagio, said there was no evidence other than the testimony of a single witness.  "I didn't think there was enough to convict, but I don't think they wanted to let him go," Salvagio said.  The victim's aunt, Patricia Pickett, expressed gratitude for the one victim willing to come forward.   Sentencing is set for September.  Jones faces a maximum sentence of 20 years to life in prison.