Rio McFarlane was inadvertently caught in the crossfire of a petty dispute between rival gangs police said today as his killer was jailed for a minimum of 35 years.
The promising footballer was shot in the chest by Leon Pacquette in Peckham, south London in 2010.
"Rio was neither in a gang nor involved in criminality, but he inadvertently ended up in the crossfire of a petty dispute between rival gangs," Detective Constable Richard Williamson, Trident Gang Crime Command, said.
"For the sake of Rio's family, I am pleased that we have been able to bring the man responsible for his murder to justice and we hope today's verdict offers some comfort to them."
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.