Darlie Lynn Peck Routier (born January 4, 1970) is an American woman from Rowlett, Texas, who was convicted of murdering her son, five-year-old Damon. She was never charged with the murder of her other son, six-year-old Devon. Both boys were stabbed to death with a large kitchen knife. Routier received the death penalty.

On June 6, 1996, at 2:31am, 911 dispatchers in Rowlett, Texas, received a call from 5801 Eagle Drive, the Routier home. Routier told the operator that her home had been broken into and that an intruder had stabbed Devon and Damon and attacked her.

Police arrived within three minutes of the 911 call. They discovered a window screen in the garage had been cut, which indicated a possible entry point for an intruder. A search of the house and grounds did not locate an intruder. Having thus secured the site, police permitted paramedics to attend to the victims.

While the boys sustained fatal injuries, Routier's wounds were superficial. She was treated at a hospital and released two days later. Her youngest son, 7-month-old Drake, was asleep upstairs with her husband, Darin, at the time of the murders. Neither was harmed.

Newscasts showed Routier and other family members holding a birthday party at the boys' grave to posthumously celebrate Devon's 7th birthday, just eight days after the murders. She was shown smiling and laughing as she sprayed Silly String on the graves in celebration, singing "Happy Birthday." Family members point out that the newscasts did not show an earlier portion of the video which depicted a solemn ceremony honoring the children. Four days later, she was charged with capital murder.

Routier later commented on the video, saying, "He wanted to be seven. I did the only thing I knew to do to honor him and give him all his wishes because he wasn't here anymore. But how do you know what you're going to do when you lose two children? How do you know how you're going to act?"

The prosecution suggested that Routier murdered her sons because of the family's financial difficulties. Prosecutors described her as a pampered, materialistic woman with substantial debt, plummeting credit ratings, and little money in the bank, who feared that her lavish lifestyle was about to end. Jurors also saw the Silly String video. Crime scene consultant James Cron testified that evidence suggested the crime scene had been staged.

Routier was represented at trial by lawyer Douglas Mulder. Defense attorneys said that there was no reason why she would have killed her children. They said that the case did not have a motive, a confession or any witnesses. They asserted that it was unrealistic to accuse her of staging a crime scene. Her attorneys advised her not to appear on the witness stand, but she testified anyway and "withered under cross-examination by prosecutor Toby Shook."