Dealing with the death of one sibling is tough, but another can be maddening. In his interview with People, Luke shed light on the mysterious circumstances that surrounded Kelly's death.

“She was home with her 3-year-old, and it was like someone turned the lights out,” Luke explained. “They never determined what happened. The autopsies, the coroner, no one could figure it out.”

He went on to call Kelly’s death “abnormally tragic.”

What’s even more heartbreaking is that Luke questioned God after Kelly’s death.

“But I’ve come to a peace," he said. “I don’t like it. I don’t like that my sons are missing that side of my family. But someone else is deciding things.”

Although the loss of Chris and Kelly has taken a toll on the Bryan family, it has also shown them the power of family and support.

Luke and his wife Caroline took in his sister's kids, becoming the parental guardians for Kelly’s children —Jordan, Kris, and Til — after Kelly's husband tragically passed away in 2014.

Luke and Caroline also share two kids of their own named Thomas and Tatum.

"We never thought twice about it," Caroline told People in 2017 about taking in Luke's nieces and nephew. "You know, it was never something that he and I had to sit down and talk about, you know, should we take this on? We just did it."

We would like to send our deepest condolences to the Bryan family.