The father of Paul Foster, who was shot dead in Luton in April, has joined police as they appeal for more help to catch his killer.
It's the first time Mr Foster's family has spoken since the shooting at Brunel Road in Lewsey Farm.
More top news
A timeline of exactly what happened.
The car reportedly used as part of a terror attack in Westminster was registered in Chelmsford.
The region's MPs are all thought to be safe after an apparent attack at the Palace of Westminster in London.