Speaking on Good Morning America, Cassie Laundrie said that she has not been able to speak with her brother, Brian Laundrie, since he returned from his road trip.
“I haven’t been able to talk to him,” she said. “I wish I could talk to him.”
Ms Laundrie said that she wished that she could be more helpful, but said she had “cooperated in every way” that she could.
“I wish I had more information, or I would give more. This is all I have, this, I gave to the police.”
Reacting to the body camera footage of the altercation between Ms Petito and her brother, Ms Laundrie said: “It looked typical of both of them.
“Whenever they fight they would take a little break and come back and be fine. Because that’s what you do in a couple.”
She said that her brother was a “wonderful” person who had always been there when needed, and added that she hoped Ms Pepito would return “safe and sound”.
“He’s a wonderful uncle, he’s always been there when I need him, he’s been there every time that Gabby needed him.
“Me and my family want Gabby to be found safe. She is like a sister and my children love her, and all I want is for her to come home safe and sound and for this to be just a big misunderstanding.”