A fireworks store released video of the father who was renting a 6,000 sq. ft. home in the Avila community, buying $600 worth of pyrotechnics, just three days before his home went up in flames.
"Mortars, reloadables, nothing out of the ordinary," said Rocky Diroma, the manager at Phantom Fireworks.
Deputies found four bodies inside, with friends saying they belong to Darrin Campbell, his wife Kimberly, and their teenaged children, Colin and Megan.
Deputies also say he bought several gas cans at a local hardware store.
Combine that with word they found an automatic gun registered to him, that he and three family members were shot, that the fire was set intentionally, and that deputies are not looking for a suspect, and neighbors say a picture emerges.
"To have a fire like this, and the circumstances, it's really shocking," said Chris Peifer.
But deputies are still trying to figure out why they were all seemingly killed in cold blood.
They are looking at finances, other recent purchases, and all communication between them and the outside world.
They won't say who shot who, or in what sequence everything happened.
"There's some information we may not give out until we determine it's appropriate," said Col. Donna Lusczynski of the Hillsborough Co. Sheriff's Office. "We need to make sure we treat these victims and potential family members with respect and make sure everything is done properly."
Deputies say it will take a very long time to look through every square inch of the scorched home.
Hundreds of man hours to figure out the answer to a one word question: why?
"It's taking us an extremely long sign to process the scene," said Lusczynski. "We have to make sure that every piece of evidence is measured, photographed. Some of it requires just sifting through the debris."
Former TPD arson investigator James Diamond fireworks and gas make it harder to determine exactly where the original fire started, crucial in building a timeline of a potential murder-suicide.
Fireworks were found littered around the scene, but they were not strapped to any of the individuals. That misinformation was passed around on social media the morning of the fire, and it even made national headlines.
"This is not going to be something where we can snap our fingers and say 'OK, we know what happened," said Diamond. "The biggest challenge to the investigators is pressure from the outside. Give me an answer, give me an answer."
The million-dollar home is owned by ex-tennis star James Blake, who was apparently renting it out to the Campbells.
Campbell had been an executive for several high-profile businesses. He was most recently working at a records management firm and volunteering as treasurer at his children's private school. His wife was a stay-at-home mom, according to her father, Gordon Lambie.
The family moved to Tampa more than a decade ago. They sold a home in another exclusive Tampa neighborhood for $750,000 in 2012 and moved closer to their children's school, Carrollwood Day School, Lambie said.
Nineteen-year-old Colin Campbell was a talented baseball player who planned to graduate high school next month. His teenage sister, Megan, was a ninth-grader who made the honor roll and took dance lessons.
Information from the Associated Press was used in this report.
FOX 13 / WTVT-TV
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