A Gwinnett County woman charged with killing her husband and four children will not face the death penalty when her case goes to trial.

Isabel Martinez entered a plea of not guilty to stabbing her 9-year-old daughter and killing the five other members of her family at a brief Monday morning arraignment. The Gwinnett County District Attorney's Office had not formally declared their intent to seek the death penalty by the time of the arraignment. That is the legal deadline to decide whether or not a defendant will be eligible for the death penalty.

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Martinez, 34, is charged with five counts of murder, one count of aggravated assault and one count of third-degree cruelty to children in connection with the July 2017 attack that left 9-year-old Diana Romero seriously injured and 33-year-old Martin Romero, 2-year-old Axel Romero, 4-year-old Dillan Romero, 7-year-old Dacota Romero and 10-year-old Isabela Martinez all dead.

The DA’s office confirmed the decision not to seek the death penalty to Channel 2 Action News. The decision was made due to Martinez’s “apparent mental issues,” District Attorney Danny Porter told Channel 2.

Martinez had been depressed in  the months before the killings and had experienced outbursts of anger and sadness that friends considered unusual, neighbors told The Atlanta Journal-Constitution. Martinez felt a “devil-like spirit” was trying to take her children when they were playing in the ocean near Savannah shortly before the killings, she told a Department of Family and Child Services worker after her arrest.

Court records do not indicate that Martinez has been ordered to undergo a psychological evaluation. Her attorneys, Josh Moore and Laura Berg, did not respond to phone calls from the AJC.

Martinez, who mimed praying and gave news cameras a double thumbs up at her first court hearing in July, smiled meekly as she walked into the courtroom Monday morning. She did not speak at the hearing.

Martinez had previously told police that a “family friend” committed the stabbings in her Loganville home, but she did not give police the name of that alleged friend. The attack is believed to have occurred between 2 a.m. and 4 a.m. July 7.

Diana Romero, the only surviving child, told a DFCS worker that Martinez began stabbing the children first; when Martin Romero tried to stop her, Martinez stabbed him, according to a DFCS report. Martinez was not crying or screaming as she killed her family members, and told Diana Romero that she was "going to the sky to see Jesus," Diana Romero told a DFCS worker.

Martinez called 911 at 4:47 a.m. on July 6, and first responders found her with a cut wrist, sitting among the six stabbing victims, according to Gwinnett County police. She was detained and charged that afternoon, and has since been held without bond at the Gwinnett County Detention Center.

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In a small mobile home community in Gwinnett, Isabel Martinez was charged with multiple counts of murder in the stabbing deaths of four of her children and their father. (Erica A. Hernandez/AJC)