Police have released this video of the man they suspect of murdering a 23-year-old man working as a nightclub doorman.
It also shows three men who are potential witnesses.
Syed Mehdi was shot outside the Blue Ice Bar, Cranbrook Road, Ilford on March 1 2008.
It is believed that the suspect could have been asking these men for directions.
A �20,000 reward for information leading to a prosecution is on offer.
If you think you may know any of the men in this footage contact 020 8733 4211 or, if you with to remain anonymous, Crimestoppers on 0800 555 111.
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