Another person has been arrested on suspicion of murder, when a man was found badly injured on a bench.
On August 1, the Northamptonshire police launched an investigation after being called on a pavement behind the auctioneer court, Northampton on about 06:30 BST.
57 -year -old Robert Brown was found on a bench, and A post mortem exam On August 2, he found that he had a hand wound.
Police said a 41 -year -old man from Northampton was arrested on suspicion of murder on Friday and was released on bail on Saturday.