Moses Fadairo was shot in the chest in Lower Clapton, Hackney, on the afternoon of 26 September.
Bradley Wynter, 28, of the Pembury Estate in Hackney, has been charged with assisting an offender and possessing a firearm and is due before Barkingside magistrates on Monday.
Another man has previously been charged with murder and attempted murder.
Christopher Erunse, 27, from Greenwich in south-east London, was arrested in Birmingham three days after the killing and appeared before Thames Magistrates' Court. He is also charged with and possession of a firearm.
He is due to appear at the Old Bailey on 21 December.
Mr Fadairo was shot in Chatsworth Road and died at the scene.
A post-mortem examination gave the cause of death as a gunshot wound to the chest.
A second man has been charged by police investigating the murder of a 25-year-old shot dead in east London.