A Palm Bay mother is facing murder charges, accused of killing two of her children in Brevard County.

Just after 6 p.m. Friday, 33-year-old Jessica McCarty called 911 from the home on 1100 block of Kenmore Street NW, saying children at the home were injured or killed.

When officers arrived, they encountered McCarty standing in the front yard with a butcher knife.

“She was not aggressive towards the officers, but she was not compliant either,” said Palm Bay police spokeswoman Yvonne Martinez. “So they had to shoot her with less lethal rounds of bean bags to get her to comply and she finally did. She was taken into custody.”

Police said 7-year-old Laci McCarty and 6-year-old Philip McCarty were discovered unresponsive inside the home. Both died from their injuries at hospitals Friday night.

Their 5-month-old brother, Christopher Swist, was also found unresponsive in the yard. His father discovered the scene and called police shortly after the first 911 call came in.

The infant remains in critical condition at Florida Hospital South in Orlando.

McCarty is charged with two counts of murder and one count of attempted murder. She will face a judge Sunday on those charges.

Autopsies are scheduled for Sunday and a cause of death has not been confirmed.

"We are still trying to verify the sequence of events, how and why they occurred," said Lt. Mario Augello of the Criminal Investigations Division. "This is still a very active criminal investigation and our priority as always is making sure we have the right answers so there can be justice in the deaths and injuries of these innocent children."

This is not McCarty's first arrest.

According to the Brevard County Sheriff's Office, McCarty was arrested in 2013 for acquiring a controlled substance by fraud. She was also charged with careless driving last month.

Neighbors in the area are still trying to make cope and process what happened.

"It's a quiet neighborhood with a lot of kids," said Patti Knobloch, who lives nearby. "I mean, adults do what you want to each other, but kids — you can't process that."

The Department of Children and Families released the following statement Saturday:

DCF is grieving the loss to the McCarty and Swist families in the midst of this terrible tragedy.  When the lives of innocent children are taken it leaves family, friends and the community with many unanswered questions. The Department is working closely with the Palm Bay Police Department in an effort to determine the circumstances surrounding this incident.

DCF had one prior investigation with the family in 2009 regarding allegations of inadequate supervision. That investigation was closed with findings and the mother was referred and receiving services from a community mental health provider.  There have been no other incidents with DCF involvement since that time.

Due to the serious nature of the allegations, DCF Secretary Mike Carroll has asked for a review of the circumstances leading up to this incident, led by the Assistant Secretary for Child Welfare and the Assistant Secretary for Substance Abuse and Mental Health.