A £50,000 reward is being offered after a father-of-three was shot dead while he sat in his car on his driveway.
Redwan El-Ghaidouni was killed exactly a year ago today with police now offering the reward for information about his killer.
On February 3 2015 at 7pm, Mr El-Ghaidouni was approached by a man who repeatedly shot him through his car window.
The suspect then ran off through an alleyway leading to Saunders Road, Hillilngdon and then turned the corner where he was captured on CCTV.
He then ran off in the direction of Dowding Road.
The man was wearing a dark hooded top with large logo on the front, dark bottoms, gloves and shoes or trainers.
Police say they believe the man had tried a number of times previously to shoot Mr El-Ghaidouni after he was repeatedly seen in the area, including on January 31 and February 2
Officers are particularly keen to hear from a person seen standing on the verge by a telegraph pole at the junction of St Andrews Road and Vine Lane which is opposite the victim's house.
Anyone with any information should call 020 8785 8099 or Crimestoppers anonymously on 0800 555 111.