According to family members, Shawna Weems confronted a man and woman who were using drugs outside the bedroom window of Weems' children at about 12:30 a.m. on Sept. 18.
Weems's husband said she simply asked the man and woman to move down the street. Instead, the woman allegedly brandished a knife and stabbed Shawna Weems multiple times.
Early Friday morning, a search warrant was served in the 600 block of Vista Del, authorities said.
Arrest made in fatal stabbing of Hemet mother of 3
"During the warrant service, investigators located 27-year-old Autumn Goodwin, a Hemet resident," the Hemet Police Department said in a statement. Goodwin was arrested on suspicion of homicide in connection with Weems's death. Her bail was set at $1 million.
"She was just the most colorful woman I ever met in my life. She was so full of life," said one mourner at Saturday's vigil. "She had the biggest heart."