DENVER -- A grieving family is sharing their memories of the woman and her two children who were killed by an apparent drunk driver.

The children's father, Frank Bingham, survived and has been released from the hospital. His sister and brother-in-law spoke to 7NEWS Tuesday afternoon and said that he may never regain full movement in his right arm because of the nerve damage that he suffered in the hit-and-run, but they're thankful he's alive.

Bingham lost his wife, Becca, and his 4-year-old daughter, Macie, and 2-year-old son, Garrison. The family of four was walking in downtown Denver, enjoying a Friday night on the town, when a speeding truck slammed into them as they were making their way through a crosswalk.

The suspect is behind bars. The district attorney is expected to file formal charges against Lawrence Trujillo Wednesday. He is accused of speeding through a red traffic light and hitting the Bingham family before fleeing the scene. The arrest affidavit said Trujillo confessed to the crime over the weekend.

"It's a wave of emotion where sometimes the tide is out and other times it's a tsunami," said Bingham's brother-in-law Robert Stone.

As the family tries to come to terms with the tragedy that took the lives of their loved ones, they reflect on happier times.

"We traveled with them. We went to Hawaii with them. We went to Mexico," said Stone. "It was great -- their kids playing with our kids and just hanging out."

Bingham's sister, Autumn Stone, and her husband, Robert, said Macie and Garrison were very close to each other.

"Like two peas in a pod, they always liked being together, whether they were at home or over at the cousins'," said Robert.

Autumn and Robert's children, Rylan and Landon, lost their cousins and their mother lost a beloved sister-in-law.

"They were so happy. Everything was the way they wanted it to be," said Autumn. "They were a great family."

Autumn said Bingham and Becca had a close, loving relationship.

"(Becca) was from the south. She had a great southern accent," said Autumn. "She was one of those people with a great sense of humor, and she could say anything with her charm and get away with it."

Robert also describes Becca as a charmer.

"She was a southern bell and she would just light up the room with her smile," he said.

Autumn said emotionally, her brother is doing as well as can be expected. In terms of the family's own emotions, they said they are devastated but determined to help him get through this.

Physically, Bingham has not yet regained the use of his arm.

"It's kind of a wait-and-see situation. They don't know what kind of long-term damage he's going to have in his arm," said Autumn.

Family friend John Youngquist said Bingham is filled with sorrow and grief and is focusing on taking it one step at a time.

"Frank is a man of strong faith. In this week he has just been challenged with sorrow and sadness," said Youngquist. "He wants to understand and he wants to engage in conversations about what life is about."

Youngquist said Bingham doesn't remember the horrific accident, or the moment it occurred, though he was aware in the hospital that Becca, Macie and Garrison had been killed.

"Frank understood through the horrifying experience of Friday night and Saturday that he'd lost his wife and he'd lost his children," said Youngquist. "His first thoughts and questions were truly about the loss and how to reach into his faith and what steps (he needs) to take to understand."

Youngquist said Bingham has not spent much time focusing on the suspects, but on his own grieving process.

"He's a strong man of faith. He and Becca were very involved in the church," said Robert. "He's not thinking of that other part right now. He's thinking of Becca and the kids and taking it one step at a time."

Funeral services will be held for Becca, Macie and Garrison on Wednesday afternoon at Colorado Community Church at Hampden Avenue and Colorado Boulevard. The service begins at 2 p.m. and is open to the public.

Anyone who wants to attend is invited to bring a children's book, as a tribute to Bingham's love for education. Many friends and family from the education community are expected to attend Wednesday's memorial service.

Frank is widely known for his work teaching aspiring principals through a center he founded at the University of Colorado at Denver. He was the principal of Bromwell Elementary in Denver for five years.

More than 75 percent of teachers and staff at Bromwell were either hired by Bingham, worked for him or have taken classes from him.

The current principal, Jonathan Wolfer, said much of the staff remembers remember when Bingham met his then fiancée, Becca, and when their two children were born.

"I know how much his family meant to him," said Wolfer.

Wolfer said coping with the horrific crash is still hard. He has children around the same age.

"We as parents, as teachers -- we're blown away," he said.

Now, the Bromwell community is looking for ways to support Bingham and remember the family he tragically lost.

"We'll be working together closely to find ways to honor Frank's family," said Wolfer.

One idea is to plant a grove of trees around a playground Bingham helped to create. The playground is one of the first at a Denver school designed for students with physical disabilities.

Wolfer said arrangements have been made for a large number of substitute teachers Wednesday so anyone who wants to can attend the memorial.

A memorial fund for the family has been set up by the Cherry Creek Community Church. A contribution can be made through:

Bingham Family Memorial Fund
First Bank (any location)
P.O. Box 507
Arvada, CO 80001

The money goes to the International Orphans-Adoptions Agency and Denver Dumb Friends League -- organizations that were near and dear to Becca Bingham's heart.

Bingham told friends and family that he hopes the memorial will draw the memory of his family into the future.

UCD is accepting cards and letters for the family. You can mail them to:

Frank Bingham
c/o Lynn Rhoades
Box 106
P.O. Box 173364
School of Education & Human Development at UCDHSC
Denver, CO 80217-3364