Authorities suspect contracted hit in couple's slaying, source says

By Ross Levitt and Susan Candiotti
CNN

(CNN) - A source with knowledge of the investigation tells CNN the state attorney's office believes there were two motives in the home-invasion killings of Florida couple Byrd and Melanie Billings - a robbery and a contracted hit.

The source said the state attorney's office is currently working under the belief that most of the suspects in the case thought they were there for a robbery, but that Leonard Gonzalez Jr., who authorities have described as the organizer of the crime, and other yet-unnamed suspects were plotting a hit on the couple.

The source said that from "Gonzalez down" it was a robbery and that from "Gonzalez up" it was a hit. The source was not sure of the exact motive behind the hit.