The family of a great-grandfather killed shortly after he was given the all-clear from cancer have paid tribute to his "wisdom", "wit" and "charm".
Donald Lock, 79, was stabbed repeatedly in an apparent road rage attack after a minor crash with another car.
The driver got out of the car and fatally stabbed the pensioner before driving away, Sussex Police said.
Today members of Mr Lock's tearful family hugged each other for support as they told of their sadness at his death, and thanked the public who battled to save his life.
His voice cracking with emotion, Mr Lock's son Andrew said: "The whole family are incredibly overwhelmed with all the messages of sympathy and support, the sheer volume of tributes on the various social media sites, and people even changing their profile pictures to a picture of dad.
"To the people who tried their best to help dad at the scene, we are deeply grateful for what they did, and know they did all that they could. We can only say thank you to you, and they are very much appreciated."
He added: "It is now a very difficult time for all of us, and we will be working hard to support mum through the unenviable process that will follow as a result of the circumstances, which will only delay the chance for us to move on and just remember dad for the fantastic person he was – full of wisdom, full of wit, always calm.
"Always supportive, the perfect role model, and full of charm.
"Don, dad, granddad and great-granddad the best."