HONG KONG — American Nancy Kissel, twice convicted of murder over the 2003 killing of her banker husband, will not appeal her life sentence and is seeking a transfer to a US prison, her lawyer said Thursday.

"She has filed an application to be transferred to United States to serve her sentence," Colin Cohen told AFP, adding the 28-day period for his client to file an appeal against her conviction has expired.

Cohen declined to comment further on the housewife's application, over concerns it "could affect" her transfer application.

A spokeswoman for the city's Correctional Services Department told AFP: "We will not disclose any details of individual prisoners due to privacy concerns."

Hong Kong and the US government signed an agreement in 1997 allowing prisoner transfers between the two jurisdictions, but it was not immediately clear whether Kissel's application would be granted.

Kissel, 47, was convicted of murder in March after a retrial in which jurors heard that she drugged her husband with a sedative-laced strawberry drink before beating him to death with a lead ornament.

She was first convicted of murder and handed a life sentence in 2005, but Hong Kong's Court of Final Appeal overturned the conviction in February last year, citing legal errors, and ordered a fresh hearing.

Dubbed the "Milkshake Murder", the case shone a spotlight on Hong Kong's elite expatriate community.

The original hearing aired sensational allegations of a heady mix of adultery, violence, spying, greed and enormous wealth, gripping the former British colony and inspiring books and films.

The Michigan-born mother-of-three always admitted she killed her husband but maintained she acted in self-defence against an abusive spouse who subjected her to physical and sexual abuse.