A man from Essex who almost died after being stabbed by two men has put up £20,000 of his own money as a reward to catch them.
Chris Davies was attacked after arriving for work at a yard in The Piggeries, in Woolmongers Lane, Stondon Massey, on 23 February.
Mr Davies said: "The people who tried to kill me should be in prison paying for what they have done."
Police are treating the incident as attempted murder.
Seven arrests have been made since the investigation began but no-one has been charged.
The reward is for any information which leads to the conviction of the people responsible.
Det Supt Liam Osborne said: "Detectives from my team have been working tirelessly on this case to find the people responsible for this violent offence.
"So far we have been unable to bring charges against anyone and I am appealing to the public to given us any information they can which may enable us to give Mr Davies the conclusion he so rightly needs."