Three people have been arrested in connection with the murder of a businessman who was shot dead as he parked outside his house.
Mr Moka was just starting on a new business
Dumbi Moka, 31, died in Ponders End, north London, last April after being hit in the chest.
Police believe he knew his killers and had offered a £15,000 reward to catch them.
Two men aged 20 and 17 and a woman aged 17, all from the north London are being questioned in east London.
On the night he was killed, Mr Moka had been parking his CLK Mercedes outside his home in Elmcroft Avenue when he was approached by the gunman.
They got into an argument and at least one shot was fired.
Mr Moka was had planned to open a travel agents in Edmonton, north London, in the week he was murdered.