Police are searching for the elderly victim of an assault on Steep Hill in Lincoln.
Officers said an elderly man with white hair was approached by a male who assaulted him by slapping him on the back at around 5pm on April 8.
The unprovoked attack was caught on CCTV and a suspect was identified by investigating officers.
Police issued an appeal to find the victim of the attack.
Anyone with information can call the non-emergency 101 number, quoting incident 33 of April 8.