An American who drugged her investment banker-husband with a milkshake and bludgeoned him to death more than seven years ago was convicted of murder Friday at her second trial in a case that grabbed world attention with lurid details on the breakdown of a wealthy expatriate marriage in Hong Kong.

The unanimous verdict and automatic life sentence match the outcome of the first trial against Nancy Kissel, whose lawyers argued she was a battered, clinically depressed wife who acted under diminished responsibility when her husband provoked her attack.