TUCKER, Ga. -- Investigators on Thursday returned to the scene of a deadly house fire that killed and mother and her two daughters.
Earlier this month, Kathy Patterson, her 12-year-old daughter Kayla, and 9-year-old daughter Madeline perished in a fire at their Tucker home. Dad Brent Patterson was the only one who made it out of the home alive.
Thursday morning Patterson said over the phone that he didn't know why the investigators were there but said he is, "hanging in there."
"They didn't tell me anything. I don't know, I really can't talk right now about this but thanks for calling."
Investigators on the ground tell 11Alive Gwinnett County District Attorney Danny Porter is their point person.
A statement from Gwinnett County Fire said the investigation is still active and today's visit is "common."
"Fire Investigators are back at the site of the fire today, Thursday, February 25, 2016, meeting with insurance investigators, electrical and mechanical engineers, representatives from the Gwinnett County District Attorney's Office, Gwinnett County Police Department and other assisting agencies. The purpose of today's visit is to further explore the scene to try and understand what may have taken place inside the home in the moments leading up to, during, and immediately after the fire. "
Gwinnett County Fire Public Information Officer Captain Tommy Rutledge said investigators have been communicating with Patterson through his attorney.
Rutledge also said engineers are on the scene to help with reconstruction and to try to figure out how the fire spread so quickly. He emphasized "no foul play" is expected.
"This is an open investigation and they are looking at all angles," Captain Rutledge said.
Before investigators could get inside the home, the structure had to be reinforced.
Several bags of evidence were collected from the home.
Detectives were going door-to-door trying to talk to neighbors. Family vehicles were also towed from the scene.
Rutledge said the house would be demolished after investigators got everything they needed.
Photos | Kathy Patterson and family