Family members of the Steenkamps. Picture: Danie Van der Lith

Kimberley - All the court knows about a 17-year-old boy who killed the Steenkamp family is that he is a murderer, Northern Cape prosecutor Hannes Cloete said on Thursday.

“We have arrived at a time where his rights must be curbed,” Cloete submitted to the court.

Northern Cape Judge President Frans Kgomo was hearing argument in an application for an extension of the boy's bail until sentencing at the time.

Earlier, Kgomo indicated that he did not really know the boy accept for the evidence that was before the court.

Cloete replied that it was now known that the boy was a cold-blooded murderer who wiped out a family.

He agreed if the court looked at the reasons why the murders were done, it did not paint a good picture.

“It would not be in the interest of justice that he gets bail again,” submitted Cloete.

The boy's defence team suggested that strict bail conditions would be acceptable.

The boy's guardian testified in support, but the court was shown a picture where the boy had access to a firearm during an hunting excursion on the guardian's farm.

Kgomo replied that this fact made him feel creepy.

He refused bail and ordered that the boy be held at the Kimberley prison until the next hearing for sentencing procedures on May 13.

Earlier in the day, Kgoma convicted the boy on three counts of murder.

Kgomo also found the boy guilty on a rape charge and a charge of defeating ends of justice.

“I am satisfied that the minor accused committed all the offences.”

Kgomo said the State had proved the charges beyond reasonable doubt.

“The murders were premeditated.”

Northern Cape farmer Deon Steenkamp, 44, his wife Christelle, 43, and daughter Marthella, 14, were shot on their farm Naauwhoek, near Griekwastad, on April 6, 2012.

Kgomo held the teenager also raped the girl and lied to the police.

The judge said the girl was tortured before her parents were killed execution style.

Kgomo said he wanted to refrain from saying anything of the boy's demeanour in the witness stand, but remarked the boy did not show any emotion in the stand.

He testified with a strong voice and did not even become flustered when the State painted him into an corner, the judge said.