RIP Colin, Darrin, Megan, and Kim Campbell. I love you guys forever. pic.twitter.com/pd4dNcZUhI— Jack Syron (@JackSyron) May 7, 2014
One teen who was driving out of Avlia told ABC Action News he knew the victims and was close with one of them.
"I was really good friends with him, he hasn't done anything to anyone ever, and the daughter, she was beautiful and their parents were great people. It's just so bad this happened," he said through tears.
The fire proved extremely difficult to extinguish, Lusczynski said. Hot spots continued to burn and at one point, the fire re-ignited inside the 7,600 square-foot home.
At noon, firefighters were still dousing flames.
Lusczynski said it may be Thursday before sheriff's detectives can gain access.
"We're going to be here for days," she said, adding that's it's too early to determine the cause of the fire or if its origin is suspicious.
"We haven't been able to confirm how they died. We haven't been able to search the entire residence," Lusczynski said during a Wednesday morning briefing.
"Due to the magnitude of the structural damage caused by the fire, this investigation will be a slow, meticulous process," the Hillsborough Sheriff's Office said in an afternoon release.
Blake, 34, was ranked fourth on the ATP world tour in 2006. He also has the James Blake Foundation, an organization dedicated to cancer research, in memory of his father who died of gastric cancer.