A homeless woman accused of stabbing two people in San Francisco in disputes over portable toilets was found guilty Wednesday of second-degree murder, assault with a deadly weapon and other charges.

Lizette Cauich, a 25-year-old Los Angeles native, wiped away tears as the verdict was read in the unusual case in which she admitted to killing 58-year-old Mitzi Campbell in June 2016 in a crime captured on video.

Cauich took the witness stand in Superior Court in her own defense, saying she stabbed the flagger at a South of Market construction site in self-defense after Campbell pulled her hair — an assertion disputed by prosecutors.