Prosecutors have charged 35-year-old Eva Daley with first-degree murder for the June 2007 stabbing death of Jose Cano in a Long Beach park.
Cano was a bitter rival of the woman's 14-year-old son and prosecutors say she wanted revenge because Cano allegedly stabbed her son earlier.
Daley's 2008 murder conviction was overturned two years later by an appellate court that ruled jurors got what justices called "impermissibly ambiguous" instructions.
A mistrial was declared last month in a second trial because of a jury deadlock.
A Long Beach judge on Thursday set her third trial for late February.
Information from: Press-Telegram, http://www.presstelegram.com