The mother who gave a 'thumbs up' to the cameras as she was tried over the murder of her children and husband is to undergo a psychiatric evaluation.

Isabel Martinez, 33, is accused of stabbing her four children and husband to death at a home in Loganville, Georgia.

On Saturday, one day after the alleged killings, she smiled and gleefully posed for photographers as she appeared before Gwinnett County Magistrate Judge Michael Thorpe.

A wake is to be held in Lawrenceville for her husband Martin Romero, 33, and kids Isabela, ten, Dacota, seven, Dillan, four, and Axel, two.

Martinez is in the country illegally, according to US Customs and Immigration Enforcement spokesperson Bryan Cox, and

Immigration authorities have placed a hold on Martinez, who is from Mexico and entered the US illegally.

Cox said this is Martinez's first encounter with immigration authorities and it is not clear how long she has been in the US.

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Isabel Martinez, 33, smiled and posed for the cameras as she appeared at her first court hearing just one day after police said she stabbed four of her children and their father to death and seriously injured another child at their home outside Atlanta, Georgia

Martinez killed Martin Romero, 33, left, and four of the five children they had together, pictured. Diana Romero, nine, in front of Martin, survived. The other children, from left to right are: Axel Romero, two, (in the stroller), Isabela Martinez, 10, Dacota Romero, seven and Dillan Romero, four

Martinez appeared before Gwinnett County Magistrate Judge Michael Thorpe Friday and said she did not want an attorney. She is facing five counts of malice murder, five counts of murder and six counts of aggravated assault

The injured child, Diana Romero, nine, survived but remains hospitalized with injuries described by police as serious. Police said Thursday evening that she was in serious but stable condition.

A GoFundMe page has been set up to help pay for Diana's medical costs and the funeral costs for the deceased.

The four children killed were identified as Isabela Martinez, 10; Dacota Romero, seven; Dillan Romero, four; and Axel Romero, two. Their slain father was Martin Romero, 33.

According to the page, Diana has had surgery to repair damage from multiple stab wounds.

She is expected to be in the hospital for two to three weeks before starting physical therapy.

Before the hearing began, Martinez sat with other inmates and struck poses for news cameras - smiling, giving a double thumbs up, putting her hands in a prayer position and spreading her arms out wide.

As Judge Thorpe listed the charges she faces - five counts of malice murder, five counts of murder and six counts of aggravated assault - Martinez smiled, shook her head 'no' and wagged her finger at him.

The judge advised her sharply not to perform for the cameras.

When the judge informed her of her right to have an attorney, she said through a Spanish-language interpreter, that she doesn't want an attorney.

She later added that her attorney will always be the people and her faith.

Thorpe strongly advised Martinez to hire a lawyer or to allow one to be appointed for her.

'What prompts a person to take the life of such innocent children and her spouse is something we may never understand,' Gwinnett County police said in a statement.

'This is a horrendous crime not only for the victims but for the extended family, neighborhood and community.'

Diana Romero, pictured, was in serious but stable condition Thursday evening, police said in a brief update on the case

Before the hearing began, Martinez sat with other inmates and struck poses for news cameras - smiling, giving a double thumbs up, putting her hands in a prayer position and spreading her arms out wide

As Judge Thorpe listed the charges she faces, Martinez smiled, shook her head 'no' and wagged her finger at him

Martinez gestures towards news cameras during her first court appearance Friday. The judge told her not to perform for the cameras

Psychologists and others who study cases of mothers accused of killing their children say it's not as uncommon as people might believe.

But media coverage often focuses on dramatic cases, such as Andrea Yates who was found not guilty by reason of insanity for the 2001 drowning deaths of her five children.

Martinez, pictured, who has been charged in the stabbing deaths of four of her five children and their father in Loganville, Georgia, outside Atlanta

Other cases get less attention, as when a woman kills a newborn or in children's deaths blamed on neglect, said Cheryl Meyer, co-author of two books on mothers who have killed children based on about 1,000 cases during the 1990s.

That amounts to one death every three days. If anything, the total based on media reports at the time underestimates the reality, said Meyer, a psychology professor at Wright State University in Ohio.

In cases when mothers kill intentionally, Meyer said there is often another influence, such as mental health issues, postpartum depression or the loss of a close loved one.

Yates' attorneys, for instance, said she had severe postpartum psychosis at the time she drowned her children, including her 6-month-old daughter.

'We like to classify these women as pariahs, that they aren't at all like us,' Meyer said. 'I found that was not the case.'

Martinez was 'immediately' detained after the bodies were found inside the home in Loganville, about 30 miles east of Atlanta, Gwinnett County Police Cpl Michele Pihera told reporters at the scene Thursday morning.

Martinez was 'immediately' detained after the bodies of her victims were found inside their home in Loganville, Georgia

Police confirmed that the 911 call came from a woman who was inside the home at 4.47 am Thursday to report a stabbing. They believe Martinez made that call. She is pictured speaking to the judge through a Spanish language interpreter, left and standing to leave the courtroom, right, on Friday

Isabel Martinez, right, listens as a magistrate judge speaks during her first court appearance

Authorities haven't said if Martinez was injured or discussed a motive.

'Right now we believe we have everybody involved in this crime,' Pihera said.

Pihera confirmed that the 911 call came from a woman who was inside the home at 4.47 am Thursday to report a stabbing. Police believe Martinez made that call.

Pihera said the caller was speaking Spanish, which initially made it difficult for 911 operators to communicate with her.

Early indications are that a knife was used to attack the five, though a medical examiner will make the final determination about the cause of death, she said.

One 2014 analysis of FBI data found there are around 500 cases per year of parents arrested for killing their children.

The study found that contact weapons such as a bat or edged weapons such as knives were rarely used in the cases studied. Beating, choking and drowning were most common.

It's also unusual for a woman to kill an entire family rather than her children alone, Meyer said, adding that she couldn't think of a single comparable case.

Neighbor Pedro Ramirez, 15, said that he used to watch the family's daughters in the park and that they would ride bikes in the neighborhood (Pictured, Martinez with two of her children)

Neighbors say Martinez (pictured, left and right) may have been suffering from depression following the death of her father in Mexico. Authorities haven't said if Martinez was injured or discussed a motive

Authorities load a body into a crime scene vehicle on Thursday after police found four young children and their father apparently stabbed to death

Some neighbors in the small, largely Hispanic neighborhood said they had no clue anything was amiss in the home until police mobbed the scene Thursday morning.

The neighbors said the Spanish-speaking family had moved to the community recently, and their children seemed happy playing with other neighborhood kids.

Victoria Nievs said the children's mother had recently suffered the death of her father.

Jim Hollandsworth is spokesman at The Path Project, a nonprofit organization that runs an after-school program that the family's children participated in.

He said the family had been in the community for a few months. While the children spoke English as a second language, he said, they were fluent.

'It's awful. It's devastating. Everyone is in complete shock,' he said.

'The kids were engaged in what we're doing. They were happy. They were fantastic kids with a bright future.'

Neighbors stand outside near a home where police say multiple people were found dead. Some neighbors in the small, largely Hispanic neighborhood said they had no clue anything was amiss in the home until police mobbed the scene Thursday morning

Emergency personnel work at the scene where police found multiple people stabbed to death in Loganville, Georgia