A teenager has been arrested for the gunshot death of another teenager in Shasta Lake City. The two 15-year-olds had apparently been in a fight on Thursday. For unknown reasons, one of them then showed up Friday at the Black Canyon Road home of his adversary, who was armed with a gun, according to the sheriff’s office. The visiting teenager was shot once and died. Detectives arrested the other boy and booked him into juvenile hall for murder. Anyone with information that may help in the investigation is urged to contact the Major Crimes Unit at 245-6135.