Every Saturday morning, Kim Crespi gets in her car for the 90-mile trip from her home outside Charlotte, N.C., to the maximum security prison where her 46-year-old husband, David, will spend the rest of his life.
Like thousands of other wives whose husbands are in prison, Kim cherishes the few hours she and her husband have together, sharing news about their children, their church and their friends. But what makes these visits unusual and the bond between Kim and David different is that David is serving a life sentence for murdering their twin daughters.
Kim Crespi reminisced about happier times, telling ABC News Senior Law and Justice correspondent Jim Avila that, "It was a house of love, peace and fun. We had a perfect life."
Married for 12 years, the Crespis had five children. The youngest were identical twin girls, 5-year-old Tessara and Samantha.
"Tess and Sam were precious to us," David said. "They were incredible. They were a gift. I mean, we were just so thrilled to have them."
The Crespis lived in a large home in a fast-growing suburb outside Charlotte. David had a high-powered job as a vice president at Wachovia Bank while his wife stayed home to raise their large family.
"I had the American dream," said David.
But he also harbored a dark secret that destroyed it all.
In his late 20s, David suffered his first episode of severe depression. During the course of more than 10 years, he says he sought help from psychiatrists who treated him with therapy and antidepressants. His depression sometimes became so acute that despite being a devout Catholic, David attempted suicide.
"I did certain things where I attempted to take my own life -- running a car in the garage. I hung off a bridge in California," he said.
The attempts stopped after his wife, Kim, made him promise not to kill himself. But David said his thoughts continued to focus on death. "I thought about killing other people. They were irrational, random, crazy thoughts that horrify me."
Terrified by dark thoughts that he believed were not real, David did not share them with his wife or doctors. That turned out to be a tragic mistake.
"He never told them what he wanted to do to his family," says Mecklenburg County homicide prosecutor Marsha Goodenow. "He alone could have stopped what he did to this family if he'd just told somebody what he was thinking or feeling."
On Jan. 20, 2006, Kim and David were home with Tessara and Samantha. The girls weren't feeling well and had stayed home from kindergarten that day. David was depressed and unable to go to work. He agreed to watch the girls while his wife went out to get her hair done.
According to David, it all seemed like a sign. "And it just came to me. There is no future. There is nothing. And that's the way it's all aligned for them to die."
The twins asked their father to play hide and seek. By the time Kim arrived home, her husband had stabbed her daughters to death, and he was in police custody. In his confession later that day, David admitted to the crimes and told police that the sprinklers had instructed him to dial 911. He was placed on suicide watch and prison psychologists later diagnosed him as having bipolar disorder.