MOSCOW, Idaho – The shattered father of slain University of Idaho student Madison "Maddie" Mogen called losing his only child the "hardest thing in the world" in an interview Monday with Fox News Digital.

21-year-old Mogen was raised in Coeur d'Alene, Idaho, by her mother and stepfather, Karen and Scott Laramie, whom she called dad. 

"It’s still hard to believe sometimes. We get up in the morning, and it's like, ‘Nah this isn’t happening,' then it kicks in," said Scott Laramie.

Mogen, her best friend Kaylee Goncalves, 21, Xana Kernodle, 20, and her boyfriend Ethan Chapin, 20, were stabbed to death in the early morning hours of Nov. 13 in a rental home near campus. 

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Madison Mogen senior picture

One of Madison Mogen's senior pictures. (Jessie Frost Photography)

The grisly unsolved murders have rattled the small town of Moscow and left the victims' families devastated by grief. 

"We love her and we miss her, and it's the hardest thing in the world to try to figure out how to live without her," said Laramie, his eyes welling with tears. "It’s the hardest thing to imagine right now."

"We’re angry. Anybody would be. I’m just hoping they come up with something sooner than later. I just would like to have justice for these kids," 

— Scott Laramie, Madison Mogen's father, told Fox News Digital

Her biological father, Benjamin Mogen, previously told Fox News that he doesn't know how a parent "ever gets used to this." 

Mogen, who was known for her warmth and bubbly personality, left behind the love of her life, boyfriend Jake Schriger, according to her obituary.

University of Idaho victims Madeline Mogen, Ethan Chapin, Xana Kernodle, and Kaylee Goncalves

The victims of Nov. 13 University of Idaho massacre.  (Instagram @xanakernodle / @maddiemogen / @kayleegoncalves)

"He’s all broken up," said Laramie, who has been in touch with Schriger. "He’s having a hard time dealing with this too. Those two, they were really good together. They really clicked."

At a memorial Friday, Schriger spoke publicly for the first time about the mass murder and the loss of his girlfriend of nearly two years.

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"She was the first person I talked to every morning and the last person I talked to before bed," he said. "She was the person that I loved most." 

Mogen, a marketing major, loved all things pink and sparkly and never tired of watching the 1987 movie "The Princess Bride," her father said. 

University of Idaho students stabbed to death

University of Idaho student homicide victims were allegedly stabbed to death. (Derek Shook for Fox News/ Instagram)

"Everybody just wanted to be near her," Laramie added. "She had the world at her fingertips, and could have done anything she wanted to do. We were just so proud of her."

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The Moscow Police Department, which is working with the FBI and the state police, hasn't named a suspect or recovered the large fixed-blade knife they believe was used in the attack.

They told Laramie they don't have any leads, he said. 

Madison Mogen pink cowgirl boots

Madison Mogen had a pair of pink cowgirl boots that are still displayed in the window of her rental home near the University of Idaho campus.  (Derek Shook for Fox News Digital/ Instagram)

"They update us every day," he added. "We asked them to check in with us whether they have anything or not."

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Not knowing who did this has compounded the family's anguish, Laramie said. 

"We’re angry. Anybody would be," he told Fox News Digital. "I’m just hoping they come up with something sooner than later. I just would like to have justice for these kids."