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San Francisco Woman Convicted of Second-Degree Murder in 2018 Roommate Killing

Sentencing will be scheduled at a later hearing, with Gonzales in custody.

Overview

  • Lisa Gonzales was found guilty of second-degree murder for killing her roommate, 61-year-old Margaret Mamer, after a monthslong trial.
  • Police discovered Mamer’s remains in June 2018 inside a blue storage container at the Mission District residence on 14th Street.
  • An autopsy found Mamer died from multiple sharp-force injuries, and investigators documented her blood throughout the apartment bathroom.
  • Witnesses described foul odors and hours of sawing sounds from the bathroom, and officers later found a hacksaw during their search.
  • Prosecutors said the jury also found a knife-use allegation true, and Gonzales now faces 16 years to life in prison once the court sets sentencing.