A Colorado mother accused of the tragic killing of her two young children amid a custody battle in December 2023 has been extradited from the United Kingdom back to the United States to confront murder charges, officials revealed on Tuesday.

Kimberlee Singler, 37, was apprehended in the UK on December 30, 2023. Law enforcement alleges she drugged and subsequently killed her 9-year-old daughter and 7-year-old son, also injuring her 11-year-old daughter before fleeing the country, Colorado authorities reported.

During a press briefing, Colorado District Attorney Michael Allen announced that Singler is set to appear in court shortly, facing charges that include two counts of first-degree murder. Allen described this development as a “significant day” in the case.

Initially, Singler claimed to police that an intruder had been responsible for the horrific acts, with investigators first treating her as a victim in the incident.

Kimberlee Singler is confronting several charges, including two counts of first-degree murder. (CSPD)

Authorities noted that Singler’s daughter initially supported her mother’s account but eventually recanted her statement.

When police later attempted to arrest Singler, she was gone. Authorities eventually found her in an upscale London neighborhood.

Colorado Springs Police Chief Adrian Vasquez called the extradition a “significant milestone” in the case, noting that Singler is accused of committing an “unthinkable” act.

Kimberlee Singler was arrested in the U.K. on Dec. 30, 2023, after police say she drugged and killed her 9-year-old daughter and 7-year-old son, and injured her 11-year-old daughter before fleeing overseas. (Parker Seibold/The Gazette via AP/ GoFundMe/ CSPD)

“Crimes as horrific as this are simply heart-wrenching,” he said. “They’re just simply sad. No person, much less a child, should ever have to go through something like this.”

In their crime scene investigation in December 2023, Colorado authorities located spent rounds, a blood-stained knife and empty bottles of sleeping pills in a trash can.

Police found the two dead children in bed together.

At the time of the crime, Colorado Springs police said they received a 911 call reporting a burglary from Singler’s address, but investigators later said evidence did not support a burglary.

Both the Federal Bureau of Investigation and Colorado Springs police went to London to apprehend Singler, who fought extradition and has denied harming her children.

Law enforcement are seen at a residence where two children were found dead inside, Dec. 19, 2023, in Colorado Springs, Colo. (Parker Seibold/The Gazette via AP, File)

In January 2025, a U.K. judge ruled that Singler could be extradited to the U.S. for trial, and her appeal was denied last month.

Her attorney argued against extradition, saying that Singler would be given a mandatory sentence of life without parole if convicted of first-degree murder in Colorado, which would violate a European human rights law.