A Colorado mother accused of drugging and killing two of her children and fleeing the U.S. is fighting extradition, according to Gazette media partner KOAA. 

Kimberlee Singler, 36, is believed to have fled to the United Kingdom following accusations that she killed her 9-year-old daughter, Elianna “Ellie” Wentz, and 7-year-old son, Aden Wentz.

Early on Dec. 19, 2023, officials with the Colorado Springs Police Department received reports of a violent burglary at the Palomino Ranch condominium complex. Officers discovered Singler and her 11-year-old child with minor injuries, and the bodies of the children.

Investigators said the initial story of a burglar committing the murders began to fall apart. Then on Dec. 26, the department announced an active arrest warrant for Singler. A week later, authorities in London arrested Singler on multiple charges, including two counts of murder in the first degree and multiple charges of child abuse and assault.

Singler has been in custody in London, and attending extradition hearings ever since. In January, a judge ruled that Singler could be extradited to face murder charges in the U.S. 

However, according to a report from a KOAA affiliate, Singler’s attorney has appealed that ruling.

London court clears way to extradite Colorado Springs mother accused of killing 2 of her children

The Associated Press has previously reported that her attorney’s legal argument in these proceedings has been that to extradite her to the U.S. would violate European human rights law, in part, because she faces a sentence of life in prison without parole in Colorado if convicted of first-degree murder. Such a sentence would be considered inhumane under the European law, because it offers no prospect for release even if she is rehabilitated.

According to the KOAA affiliate, the U.K.’s High Court must now rule on whether the appeal moves forward. If the appeal is unsuccessful, Singler would have the option of appealing to that nation’s Supreme Court. 

It was not clear Thursday what the time frame of those legal proceedings might be. 

The Gazette previously reported that Singler was involved in a custody dispute at the time of the children’s death.