Humberside Police have issued a fresh appeal for help in identifying three violent burglars who left a Scunthorpe man with life-changing injuries.
The 42-year-old was attacked and robbed by men at premises in Stockshill Road on April 16 2018.
Detectives say they have carried out "extensive enquiries" since then, but despite making a number of arrests they have been unable to charge anyone.
They said they hope CCTV of the assault will help someone recognise those involved.
The victim, whose identity remains secret in order to protect his safety, said he stills suffers flashbacks of the attack.
Four men, aged 46, 31, 33 and 62 have been arrested in connection with the incident and released under investigation.
Two further men arrested in connection with the incident have been released without charge.
The detective leading the investigation described the incident as "particularly nasty".
Anyone with information should ring 101, quoting incident number 16/43406/18.