Attorneys said that in Bartel's mind he believed his wife was cheating on him and that his family needed cleansing before the world ended

Bartel was convicted of aggravated assault with a deadly weapon on a family member and injury to a child

His son's back was cut with the shape of a pentagram and blood was smeared on the door of the family home

A father who carved a large pentagram into his six-year-old son's back and then called emergency services to tell them what he had done has been found guilty of aggravated assault with a deadly weapon and injury to a child.

Brent Troy Bartel, 42, of Richland Hills, Texas, said that he attacked his son, cutting his back with a box cutter because 'it's a holy day'. The date of the attack was 12-12-12, a once-in-a-century event.

Bartel's defense attorney, Joetta Keene, told a Tarrant County jury that Bartel believed that the world would end at midnight on 12-12-2012 and everyone would die.

Bartel called 911 shortly after midnight to report the incident .

'I shed some innocent blood,' he calmly told the emergency services. 'I inscribed a pentagram on my son.'

Scroll down to hear the 911 call

During the trial the court heard that 11 or 12 psychiatrists agree Bartel, pictured above in mugshots, is a schizophrenic

Chilling: Bartel, pictured here with his young son, told a 911 dispatcher that he 'shed some innocent blood' in honor of the 'holy day,' likely referring to the historic date 12-12-12

Asked why he did it, Bartel said: 'It's a holy day.'

Blood was found smeared on the frame of the front door of the home.

Shortly after Bartel confessed, the boy's mother ran to a neighbor's house and also called 911 to report that her husband was hurting her son and was armed with a knife.

Officers who responded to the two calls arrived to discover the boy shivering in the front yard dressed in pajama pants without a shirt.

The child's back was covered with a large pentagram. Officers wrapped the six-year-old with a jacket and called the paramedics.

Disturbing: Officers said the father took some of his son's blood and smeared it on the door frame

The Star Telegram reported that on Thursday jurors had deliberated for five hours before convicting Bartel of aggravated assault with a deadly weapon on a family member and injury to a child.

The jury was then asked to assess a sentence - the maximum sentence on the assault charge is life or 99 years in prison and the injury to a child charge carries a 10-year maximum.

The court heard that Bartel was an undiagnosed schizophrenic. Attorneys said that in his diseased mind, he believed his wife was cheating on him and that his family needed cleansing before the world ended.

Unsettling scene: The six-year-old was found shivering outside his home dressed only in pajama pants and no shirt

During the trial the court heard that 11 or 12 psychiatrists agree Bartel is a schizophrenic, Keene said before the verdict was read out.

'What it will come down to is whether the jury believes he knew what he was doing was wrong,' Keene added.

Keene told jurors that Bartel needed to be in a hospital where he could recover from his mental illnesses.

Bartel had been in jail in 2007 and returned again in 2012 and during each incarceration his mental health deteriorated, Keene said.

'Cages don't do for people with mental health problems,' Keene said. 'Judge him based on his mental state.'

In 2007 Bartel attacked had attacked a sheriff's deputy in court while appealing a traffic ticket he received when working as a truck driver in Pennsylvania. Bartel pleaded guilty and was locked-up for eight months.

The court heard that the boy, who is now nine, will not take off his shirt for anyone except his mother. Bartel's wife Lindy, said of her husband: 'I don't hate him for what he did.'

But she added: 'I want to be married to him. I don't want to be around him, ever.'

Jurors are expected to resume deliberations over a sentence on Friday morning.

Occult symbol: Police say the father used a box cutter to cut a large pentagram - a five-pointed star inside a circle - on his son's back (stock image)