[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/CRIME/07/21/florida.slain.couple/art.gonzalez.jr.jpg caption="Leonard Patrick Gonzalez Jr., 35, is one of seven people charged with murder in the July 9 killings."]
Suspects in the slaying of a Florida couple known for adopting special-needs children did a dry run of the attack at the victims' home about a month before storming the residence, Escambia County Sheriff David Morgan said.
The information was one of many new revelations about the July 9 murders of Byrd and Melanie Billings of Beulah, Florida.
The suspected mastermind of the slaying has told authorities he knew the victims and received financial support from them for a martial arts studio he ran, according to court documents.
Leonard Patrick Gonzalez Jr., 35, is one of seven people charged with murder in connection with the couple's death. An affidavit linked to a search warrant for Gonzalez's van noted the connection between him and the couple.
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