Redwan El-Ghaidouni was shot on his driveway by a man who approached him in Vine Lane, Hillingdon, west London, on 3 February.
Marwais Kakar, 34, appeared at Uxbridge Magistrates' Court earlier charged with perverting the course of justice.
He was bailed to attend Isleworth Crown Court on 6 July.
A man has appeared in court charged as part of an investigation into the death of a man who was fatally shot in his car outside his London home.