Two men found guilty of murdering three members of a family in a revenge shooting in north-west London have been jailed for life at the Old Bailey.
Letts and Chung were convicted of three murders
Sisters Connie and Lorna Morrison and their stepfather Noel Patterson were shot dead in their flat last August.
The jurors heard Rohan Chung, 30, and Michael Letts, 36, had taken revenge for being double crossed in a drugs deal with the women's brother, Morgan.
Chung and Letts will serve a minimum of 40 years and 20 years respectively.
Handing Chung three life sentences, Judge Gerald Gordon recommended that he should be deported after serving his sentence for the "truly appalling crimes".
He told Chung, of South Norwood, south London: "In all probability you were not one of the actual gunmen but were the organiser.
"The message must go out that this sort of wanton use of guns to kill will result in sentences so long that there will be little if any liberty at the end."
The judge described Letts, of Stoke Newington, north London, as a "foot soldier" who may not have realised what was planned.
After the verdict it emerged that Chung had been removed from the UK several times, including being deported to Jamaica in 2000 after being convicted of gun crime.
He had also entered the UK on previous occasions using stolen Jamaican passports.
Prosecutors said Letts had entered the UK on a student visa in 2002 and had leave to remain until next year.
Lorna and Connie Morrison and Noel Patterson were shot dead
While refusing to comment on individual cases, a Home Office spokesman said it planned to "further strengthen our borders, backed by biometrics and tougher checks abroad, so that only those with permission can travel to the UK".
The trial heard Morgan Morrison had been acting as a drugs mule for Chung, who had set up a business importing drugs from Jamaica to the UK.
But when he disappeared after landing back in England, Chung flew into a rage and said Mr Morrison and his family would be killed for crossing him.
Prosecutor Nicholas Hilliard said: "It looked as if Mr Morrison was going to rip Chung off and keep the drugs for himself."
Letts had been on the same flight back to the UK as Mr Morrison and had confirmed his arrival back in the UK, the court heard.
The court was told Connie, 27, Lorna, 34, and Mr Patterson, 62, had not been a threat to anybody.
But all three were shot in the head in the flat on the Stonebridge estate in August 2005, in what the prosecution described as a "terrible crime".
Lorna's eight-month-old son was found covered in blood and crawling around near the bodies 14 hours later. The remaining members of the family are still in hiding.
Speaking after the trial, Det Insp Steve Horsley said: "These shootings have plunged gun crime to new depths of depravity.
"I have never before come across a case where family members have been killed in revenge."
Evelyn Williams, Connie and Lorna's mother who was working on the night of the murders, said in a statement she was extremely pleased with the verdict.
"Noel, Lorna and Connie were wonderful and completely innocent people, murdered in cold blood," she said.
"Lorna's eight-month-old baby was abandoned at the scene and will never know his mother.
"Nothing can bring them back now, but it is a comfort to know these evil men will not be able to hurt any other innocent people."