The trial of Shimon Zrihan, who was indicted for the alleged killing of underworld figure Hanania Ohana, was postponed on Tuesday for one month. The key witness for the prosecution, Yoni Alzam, mysteriously died last week. The circumstances of his death were under investigation. The leading assumption was that he was poisoned. Alzam was serving a life sentence at Ashmoret prison for his part in the murder of Hanan Ohana in 2003. He was meant to testify that Zrihan, allegedly affiliated with the Aberjil crime family from Lod, archrivals of Ohana and kingpin Ze'ev Rosenstein, had a hand in Ohana's murder.