The remaining members of the so-called "Krugersdorp Killers" were found guilty of 32 counts between them - including murder, fraud, racketeering, and robbery - by the Gauteng High Court in Johannesburg on Monday.
The group which called themselves Electus per Deus (Chosen by God) murdered 11 people between 2012 and 2016.
On Monday, Cecilia Steyn, 38, Zak Valentine, 34, and Marcel Steyn, 21, were found guilty by Judge Jacob Francis.
Marcel's mother, former schoolteacher Marinda Steyn, is serving 11 life terms and 115 years in jail after pleading guilty.
Marcel's elder brother Le Roux Steyn was also a part of the group, but entered into a plea bargain with the State in May last year. He was found guilty of seven murders and sentenced to 35 years for each of them. Ten years of his sentence were suspended on condition that he testified at the trial.
Another member of the group, John Barnard, is serving 20 years after he was sentenced in 2016.
Greed, revenge, religious extremism and manipulation underpinned the group's motives.
How it all started
The saga started in 2012 when Cecilia Steyn infiltrated a religious group called Overcomers Through Christ (OTC) under the guise of being in need of deliverance from Satanism.
Valentine, his wife Mikeila and Marinda Steyn also joined the group.
Soon the relationship between Cecilia and the leader of OTC, Ria Grunewald, soured and Cecilia became less involved in OTC.
Along with the Valentines and Marinda, Electus per Deus was formed, and together they launched a series of attacks against members of OTC.
On July 2, 2012, they placed home-made bombs under the cars of people attending an OTC course, but were nearly spotted and fled before they could ignite the explosives.
Later that month, the group started a fire and damaged windows at the Lighthouse Christian Centre in Randburg.
A note written by Cecilia was placed on the gate of the centre, which said: "Ria, who is going to protect you now?"
In July and August, various threats were sent by SMS to OTC members and other people associated with Grunewald.
On July 11 that year, Cecilia and her accomplices successfully set off explosives near cars at an OTC meeting.
The first murders
As Cecilia became more obsessed with executing revenge on Grunewald, she falsely accused Natacha Burger - an active member of OTC - of praying the so-called "danger prayer" that led to the death of various young children.
She then convinced the Valentines to kill Burger. So, on July 26, 2012, the Valentines entered the home of Joy Boonzaier, a close friend of Burger, and made her write a note asking Burger to come to her Wierdapark flat when she returned from work.
When Burger arrived, the Valentines stabbed her and Boonzaier to death.
The next victim was Reginald John Edwin Bendixon, a semi-retired pastor and a long-time friend of Grunewald. He occasionally presented lectures at OTC.
Grunewald regarded Bendixon as her mentor, and Cecilia, once again vengeful following the disintegration of her and Grunewald's relationship, began planning to have him killed.
On August 13, 2012, Zak Valentine and Marinda Steyn, disguised as police officers, entered Bendixon's home and attacked him with a hand axe. He died after being stabbed multiple times. Marinda Steyn would later, in court, describe her first murder as "exciting" and an "adrenaline rush".
At this point, Mikeila Valentine had become disillusioned with the group's activities and wanted out. Now a liability, her husband Zak and Cecilia decided to kill her.
Zak Valentine made sure he had an alibi by going to work on the day of the murder on October 4, 2012. Before leaving the house, he put some kind of tranquilliser in Mikeila's coffee. He had given Marinda a set of house keys and a gate remote. That Thursday morning, Marinda and her daughter, Marcel, who was 14 at the time, killed Mikeila by smashing her skull with a blunt object and stabbing her several times as she lay on her bed. She was 25.
Cecilia then planned to have Ria's son, Joshua Grunewald, murdered, but the three men she tasked with the killing never carried it out.
Running out of money
After being dormant for a while, Electus per Deus started running out of money. Zak Valentine had already contributed R2m of his own money, but had quit his job and started his own venture, borrowing money from his parents and in-laws.
The group believed that the money was needed for an orphanage run by Cecilia, though the orphanage never existed.
Cecilia then devised a scheme to obtain money through insurance fraud, theft and murder.
The group, believing they were committing these crimes for a "good cause", participated in good faith.
Barnard, who was sentenced in 2016, set up a meeting between his employer, Peter Meyer, and members of the group, seemingly to discuss a "business venture".
On November 27, 2015, Valentine, Marinda and Marcel arrived at Meyer's home, tied him and his wife up and demanded money. The couple didn't have much money on them and were subsequently stabbed to death.
Faking Zak's death for insurance money
Cecilia's next scheme involved faking Zak Valentine's death to get a life insurance payout of R3.57m.
They befriended a street vendor by the name of Jarod Jackson. On December 16, 2015, Jackson, together with Barnard, Marinda and Le Roux, left for the Free State in two cars - one being Valentine's Mercedes-Benz SLK.
On the way, Le Roux drugged and then strangled Jackson. On the R57 between Reitz and Petrus Steyn, they parked Valentine's SLK in a veldt, placed Jackson in the driver's seat and set the car alight.
The following day, Marinda identified Jackson's charred remains as the body of Valentine, thus obtaining a death certificate to secure the insurance payout. Cecilia was the main beneficiary.
Valentine then booked himself into the Herberg Hotel in Krugersdorp as Jacques de Villiers, using a fake ID. He hid here until April 2016, before moving to Kia Kaha Ministries in Krugersdorp, where he was arrested on June 26, 2016.
Murder by appointment
The group then embarked on a series of appointment murders. They would set up an appointment with an identified victim under false pretexts. Marinda, Le Roux and Barnard would typically intimidate the victims into handing over their bank cards. Marcel would then go to a nearby ATM and verify that the PIN was correct. Once confirmed, the victims would be murdered.
The first victim was Glen McGregor, 57, a tax consultant from Randfontein. Marinda, Marcel, Le Roux and Barnard met McGregor at his home on January 27, 2016, shot him and forced him to transfer R6 000 into Marinda's account. He died from gunshot wounds.
Anthony Scolefield, 67, a tax consultant, was the group's next victim. The foursome lured Scolefield to their flat in Krugersdorp and forced him at gunpoint to hand over his bank cards and PINs. They withdrew R16 600 from his accounts and used his cards at various shops in Krugersdorp.
Scolefield was eventually strangled and placed in the boot of his car, which was then abandoned.
Similarly, Kevin McAlpine, 29, was lured to their Krugersdorp flat on May 26, 2016, and forced to hand over his bank cards. R1 300 was withdrawn from his accounts. He, too, was strangled and left in the boot of his car.
A few days later, on May 30, estate agent Hanle Lategan, 52 was lured to the flat under the pretence of a business meeting with a client.
She was similarly threatened and R3 000 was withdrawn from her account. Police had cordoned off the area where Lategan had parked her car as she had been reported missing. The foursome then placed Lategan's body in Marinda's car and dumped her body near the Randfontein cemetery, where it was discovered the following day.
Pre-sentencing for the last three convicted members of Electus per Deus will take place on August 12.