His parents University of Idaho victims they talk about the two years of the horrific quadruple murder, while awaiting trial for their children’s alleged killer.

For victim Kaylee Goncalves’ parents, one of the devastating milestones this year is Kaylee’s younger sister, Autumn, turning 21 — the age Kaylee was when she was killed.

“At first, (Fall) just said, ‘What am I going to do when I’m older than Kaylee?'” Kristi Goncalves recalled. “You should never be older than Kaylee, but yes, you will be, and this is coming.”

“It should be an exciting and fun time for her to hang out with all her sisters and go do something fun. But someone does this to your family, robs you of all kinds of different things. And birthdays are a big part of that,” Steve Goncalves told ABC News on Tuesday.

For victim Ethan Chapin’s mother, 20, two years “seems like a long time ago” but “also feels like yesterday”.

Ethan Chapin was a triplet, and his sister, Mazie, and brother, Hunter, also attend the University of Idaho.

“They will both be graduating from college in May, and we couldn’t be more proud of all they’ve accomplished,” Stacy Chapin said in a statement.

“We continue to heal and miss Ethan as we work diligently to find the reasons behind the worst of circumstances,” she said.

Bryan Kohberger is accused of fatally stabbing Ethan Chapin, Kaylee Goncalves, Madison Mogen and Xana Kernodle at the girls’ off-campus dormitory in the early hours of November 13, 2022. Chapin, Kernodle’s boyfriend, was asleep at the time.

Kohberger, who was a doctor of criminology. student at nearby Washington State University, was arrested in December 2022. His trial date was postponed to August 7, 2025.

For the Goncalves, the last two years have been like a “poms” in the courts.

two months ago Kohberger’s trial was moved from Latah County, where the murder took place and the defense argued jurors would not be as impartial, to Idaho’s capital, Boise.

Kristi Goncalves said, “I feel like now that we moved her to Boise, as much as we didn’t want to, it was the right choice. And I’m glad that, you know, in hindsight it happened and I feel like things are going to start moving, although it still seems very slow.”

Kohberger is charged with four counts of first-degree murder and one count of burglary. A not guilty plea was entered on his behalf.

If convicted, Kohberger could face the death penalty, although his defense is arguing that the death penalty should be removed.

The Goncalves family said they support the death penalty in the case, noting the limitations the sentence would place on Kohberger’s life in prison.

“It’s honestly more about the 23 hours of solitary confinement and not being able to enroll in college and continue his career and impact on society,” said Steve Goncalves.

On Wednesday evening, the University of Idaho community will gather for a vigil to honor the four slain students.

“Together, we will honor their legacy by sharing memories, writing notes and gathering in a place dedicated to all the vandals we have lost,” the student government said.

ABC News’ Kayna Whitworth contributed to this report.