CCTV images show one of the four men accused of the murder of Paul Thrower fleeing the scene.
One of the four, Kiro Halliburton of Hayes, was convicted of the handyman's murder after a three week trial at the Old Bailey.
Two co-accused, Zakariya Subeir and Mahdi Osman, were cleared of murder but convicted of manslaughter. A youth, who cannot be named, was acquitted.
The dark, grainy image shows an individual leaving the flats in St Dunstan's Close, Hayes and moving swiftly across the front of the building while apparently texting or making a call on a mobile phone.
The glow from the screen is clearly visible.
The teen is then glimpsed, briefly, jogging along a better illuminated alleyway.
Hillingdon Police Borough Commander, Detective Chief Superintendent Nick Downing, released a statement after the verdicts today (Monday, November 24).
He said: "With today's verdict we have seen justice handed to Paul Thrower's friends and family. His killers will now face the consequences of their violent actions.
"We came together with our partner agencies at the very start of this investigation to identify any concerns relating to anti-social behaviour at Dunstan's Close.
"Within a matter of hours of this horrific incident, officers were gathering intelligence to assist murder investigators, conducting weapons sweeps and providing reassurance patrols. This allowed the continual flow of dialogue with residents.
"This dialogue has continued, grown and now forms the foundation of our day-to-day policing routine in the area.
"Our long term commitment to ensuring that our community feels safe and that their voice is heard is stronger then ever.
"We act on community concerns if groups are congregating and causing a nuisance, by deploying targeted patrols and by using a range of tactics.
"This year, 12 search warrants for drugs were executed at St Dunstan's Close, resulting in quantities of class A and B drugs being seized.
"This work builds on previous borough wide operations to tackle drug dealing, which has resulted in 20 people being arrested and convicted. This significant outcome was borne from the crucial intelligence we continually receive from residents, who actively support our fight against crime.
"We are determined to prevent crime and reduce anti social behaviour, using a dispersal zone to stop individuals and groups of young people loitering on the St Dunstan's Close.
"No community should have to tolerate the fear of anti social behaviour. Neighbourhood policing teams across Hillingdon continue to make communities safe and informed about their local area."
Prosecution hopes convictions give 'some small comfort' to Paul Thrower's family.
