Johannesburg - After spending the weekend behind bars, a man and his teenage sister on Monday appeared in the Roodepoort Magistrate's Court in connection with the Krugersdorp triple murders.Le Roux Steyn, 20, and his sister Marcelle joined two other men - Christiaan Kruger and Fabian Luff - in the dock. All of them are suspected to have been linked to the murders. The four made a brief appearance before Magistrate Delize Smit. Conducting the proceedings in Afrikaans, Smit explained their rights to them. The Steyns, who were both in black sweaters, kept their hands behind their backs, nodding to indicate that they understood what she was saying. Marcelle, 18, is the youngest of the accused.Case postponedWearing big spectacles and her short hair tied in a small ponytail to the one-side of her head, the teenage girl appeared confident as she addressed the magistrate.She and her brother indicated that they would like to use the services of a legal aid lawyer.Victor da Silva of Legal Aid SA, who is already representing Kruger, indicated that he would represent the two as well. Luff was the only one of the four who was using a private attorney. The case was postponed to June 30, when the four were expected to apply for bail. All the accused are not to be photographed until they have been through an identity parade.Community shaken by crimesKruger, the first accused in the matter, walked up the steps from the court holding cells clutching an Afrikaans Bible in his hands. He placed the Bible on the ledge in the dock in front of him during proceedings.He and Luff were arrested earlier this month in connection with the crimes. The three killings, which occurred over a three-week period last month, shook the community, sparking fears of a serial killer in the area. One of the victims was estate agent Hanlie Lategan. She went missing last month after she was meant to meet up with clients. At the time, police said she had parked her car at the Krugersdorp Private Hospital, which was close to the house where she was supposed to meet clients.Murdered and robbedCCTV footage showed two men approaching her.Her body was found by school children in a veld next to a stream. Police said there had been attempts to withdraw money from her bank account. Anthony Scholefield, an insurance broker, had been found murdered just two weeks prior to this. His body was found stuffed in the boot of his car, covered with a black bag. He appeared to have been strangled. Kevin McAlpine, another insurance broker, was also found dead in the boot of his car just days after Scholefield's body was found. He too had made plans to meet with prospective clients. McAlpine's body had been placed in a black bag. Both McAlpine and Scholefield had also been robbed of their belongings.