Baltimore County Police said a woman threatened one woman with a knife and stabbed another multiple times in a quiet Catonsville neighborhood Wednesday evening.

Lashaunta Garfield, 21, a resident of a group home in the 600 block of Lucky Leaf Circle, was arrested around 9 p.m. June 12 and charged with first-degree assault said Elise Armacost, a police spokeswoman.

Police said a masked woman approached the first woman at the intersection of Harlem Lane and Maple Forest Drive as she was leaving a graduation ceremony at nearby Westowne Elementary School, where the woman walking home works, and began to swing a knife at her.

The woman who was threatened ran home and called 911, Armacost said.

"While we were investigating that complaint, we learned that there was a second victim around the same time," Armacost said.

"A former intern for Westowne Elementary said that she was leaving the school, walking north on Harlem Lane when she was approached by a suspect meeting this same description (a woman wearing a mask and carrying a knife)."

Armacost said the second woman said she had been stabbed and "suffered some non-life-threatening injuries."

Armacost said the injured woman was taken to a local hospital for treatment.

Garfield was a resident in Mosaic Community Services' residential support homes, according to police and confirmed by Mosaic's Executive Director, Jeff Richardson.

Mosaic is part of the Sheppard Pratt Health System and provides behavioral and mental health services to Baltimore County, Baltimore City and Carroll County residents.

Richardson said the organization has been a presence in Catonsville for almost 25 years and, in addition to medical day care and employment services, also offers residential rehabilitation services.

"Consumers" are given the opportunity to live in the community in groups of three to eight people with support given by part-time staff members, he said.

"There are very specific expectations that people have to meet to live in those properties," Richardson said in an interview June 14.

He said that typically, residents in the group homes receive regular visits from support staff and only in rare cases are staff members present 24 hours a day at a residence.

"Rarely are any of the consumers that we serve violent," Richardson said. "We've been in Catonsville for a very, very long time and things go extremely well."

"When something like this happens, we have our own internal processes that we look at all the time if something happens, if there's anything we can do differently and if there's anything we can do to make it better," he said.

"We take this seriously when anything happens," Richardson said. "We are very attentive to both the community and the protection and the safety of everyone involved.

"This is such an exceptional incident," he said.