Three men who carried out the "pre-meditated brutal" murder of a businessman were jailed for life today. Mohammed Nadeen Siddique, 38, known as Toby, was shot dead in a flat in Forres Drive, Glenrothes, Fife on October 24 2010 His brother "Mo", 42-year-old Mohammed Azam Siddique, who hired the hitman and the "driving force" behind the murder, was jailed for at least 25 years. Tencho Andonov, 28, the Bulgarian gunman who pulled the trigger, was told he would spend a minimum of 29 years behind bars. Andonov had also been convicted of attempting to murder another man. The third man, Bulgarian Deyan Nikolov, 27, described in court as the conduit between his two co-accused, was ordered to serve at least 18 years in prison. The men were sentenced at the High Court in Edinburgh where they were convicted last month after a long-running trial which began in October. Judge Lord Kinclaven told them: "You have each been convicted by verdict of the jury of the most serious of crimes." He added: "This was a pre-meditated brutal murder. This was a pre-planned killing with a firearm." The brothers were partners in a family business but had fallen out. The court heard today that Toby Siddique was "callously and repeatedly" shot in the head. The three men, all first offenders, were convicted of murder by a jury last month. Andonov was also found guilty of the attempted murder of David Dalgleish in the same incident. He too was shot in the head. The trial which resulted in the convictions was one of the longest murder cases in recent Scottish legal history. Prosecutors described the killing as a "despicable crime" which was "motivated by greed". Passing sentence, Lord Kinclaven said: "You have each been convicted by verdict of the jury of the most serious of crimes, that is the crime of murder." He told Siddique: "This was a premeditated brutal murder and the jury found that you were the driving force behind the killing. It was a pre-planned killing with a firearm. The victim was your brother, Toby Siddique, who was aged 38 when he was repeatedly shot in the head. "This was a tragedy and continues to be a tragedy for all those who knew Toby Siddique, including the other members of your own family." Addressing gunman Andonov, the judge said: "You callously and repeatedly shot Toby Siddique in the head in the manner described in evidence." He said the evidence pointed to Andonov having carried out the killing for financial gain. Lord Kinclaven told Nikolov the jury found he was the "link or conduit" between Siddique and Andonov. The investigation into the attack was the largest and most complex in Fife Police's 62-year history. At one stage, 80 officers were involved in the investigation, which is now said to have cost the force £1.5 million.