Police are appealing for help to find a robber who is missing from Ford Prison.
Peter Mahoney left the prison on Friday and travelled to Brighton on day release but did not return.
He has not been seen or heard from since.
Mahoney was given an indeterminate sentence in 2010 and told he would serve at least four years after he admitted charges of racially aggravated wounding, possession of a firearm, robbery and possession of an imitation firearm.
He committed the offences on 5 and 6 November 2008.
On 5 November 2008 he racially abused a customer in a shop in Norwood, Greater London, went to his home and then returned with an air pistol and shot the victim.
The next day he threatened a group of friends with an airgun in Stone, near Dartford, after claiming to be a police officer. He stole their car and drove off.
Mahoney, 37, is white, 6’ 2” and of average build. He has links to London and Kent.
PC Steve Reed said: “Mahoney has a history of violence and is therefore a concern. We need to recapture him as quickly as possible.
“We need people to contact us if they see him or know where he is. If you see him, do not approach him but call 999 immediately instead.”
Anyone with information about Mahoney should call 101, email email@example.com or call the independent charity Crimestoppers anonymously on 0800 555111.