Tashan Daniel, 20, had been on his way to see Arsenal take on Nottingham Forest in the third round of the Carabao Cup when he was murdered on the afternoon of September 24 last year.
Rajinder Singh, 73, from Harlington, became a worldwide success story after recording exercise videos in his allotment to help the community stay active.
A suspected killer who has been on the run for more than two years has been placed on a worldwide most wanted list.