A prosecutor says she will file a more serious charge against a man who admitted killing a mail-order bride because he violated a plea agreement by appealing his 20-year sentence.

Daniel Kristopher Larson, 25, has been ordered to appear in court for arraignment Nov. 10, and Deputy Prosecutor Coleen St. Clair said she would file a first-degree murder charge against him.

Larson pleaded guilty to second-degree murder in the strangling of 20-year-old Anastasia Solovieva King, originally from Kyrgyzstan. Under his plea deal, he agreed to testify against her husband, and also agreed not to appeal his own conviction or sentence, which turned out to be 20 years.

He testified that Indle Gifford King Jr. asked him to help kill the woman so King could avoid an expensive divorce. Prosecutors said the 270-pound King sat on her as Larson strangled her with a necktie. King was sentenced to nearly 29 years in prison.

Larson, whose criminal history includes sex crimes and assault, could get a longer sentence than King, St. Clair said.