Anthony Crabb believed no one would give evidence when he murdered Stephen Davison at a pub in Carshalton, Surrey.
The trial took place against a background of witness intimidation and threats. Two witnesses are living at secret addresses. One said a pounds 20,000 contract had been placed on his head. A third was too frightened to give evidence. A pub barmaid, Kathryn Vogt, who told police she saw Crabb putting a gun into his jacket after the victim was shot, retracted her evidence in the witness box. Judge Neil Denison QC, made arrangements for the jury's protection.
Crabb, 35, of Wallington, Surrey, was also jailed for nine years concurrently after admitting perverting the course of justice. Another man, Gary Taylor, 41, of Carshalton, found not guilty of murder but guilty of perverting the course of justice, was jailed for nine years.