Isha is on trial in the High Court in Johannesburg, sitting in Palm Ridge, with Linden Wagner, Courtney Daniels, and Robin Harwood.
They are accused of murder and attempted murder.
Theologo died of her injuries in hospital a week after an apparent Satanic ritual on a hill in Linmeyer, Johannesburg, in October 2011. Her 14-year-old friend was assaulted but survived the attack.
Borchers started delivering her verdict on Thursday.
“It’s possible that he [Isha] did not know of the intention to murder and sacrifice [Theologo],” said Borchers.
In his testimony, Wagner said he struck Theologo on the head with a rock, doused her with petrol and set her alight, before attacking her friend.
Wagner told the court the attack was part of a soul-selling ritual through which he hoped to gain power. Isha testified that he watched the attack from behind a tree, and that he was scared to leave the group.
The next day he told the others he was fetching his passport to flee to the Democratic Republic of Congo (DRC). Isha is a refugee from the DRC, and does not own a passport.
A woman, who is believed to be a close friend of his, who was sitting in the public gallery, sighed and said: “Thank God,” when Borchers said she found Isha’s testimony believable.
Meanwhile two of four people accused of killing Kirsty Theologo were found guilty of murder, attempted murder and assault today.
Linden Wagner and Robin Harwood were found guilty of all three charges by the High Court in Johannesburg, sitting in Palm Ridge. They are yet to be sentenced.
Harvey Isha was acquitted of all charges while Courtney Daniels was found guilty of common assault.
Daniels was found guilty after it was established that she poured brake fluid into the drinks of Theologo and her friend.
Her lawyer, Enrico Guarneri asked the court to give Daniels a fine or suspended sentence as she was a first time offender.
Daniels was sentenced for six months which was suspended for five years on condition that she was not found guilty of assault again.
The four were on trial for murder and attempted murder, they had pleaded not guilty.