A man who plotted the murder of his former friend from his cell in high security Belmarsh prison was jailed for at least 30 years.
Andrew Wanoghu, 26, was gunned down in the street after being lured to an address in south London in a trap organised by Delphon Nicholas in April 2006.
Nicholas, 29, and gunman Trevor Dennie, 33, were jailed for life at the Old Bailey and told they must serve a minimum of 30 years.
Judge Richard Hone told the jury: "We have had an insight into what goes on in Belmarsh prison. It was a real eye-opener for us all."
Judge Hone revealed to the jury that the gun used in the murder had also been used in four other black-on-black Trident shootings. And he told them of an "astonishing outburst" of violence by Nicholas in the dock while jurors were considering their verdicts.
He told the two defendants: "You are two cold-blooded killers. You exude an aura of violence. You are both extremely dangerous."
He said Nicholas had "orchestrated" the hit from his prison cell while Dennie had executed the plan by shooting the victim.
The judge said Nicholas would have to serve nine months which would have been deducted from his sentence for time served on remand because he had attacked co-defendant Sereata Barrie.
She was later cleared of murder with two other men.
The judge said Nicholas was now in the dock in handcuffs because he had punched and attacked her. He said: "Even by the standards of Court One at the Old Bailey, it was an astonishing outburst."
