Officers investigating a robbery at a Heanor newsagents a month ago want to talk to a jogger - who may have vital clues to the culprit.
A man walked into News 4 U on Market Place and approached the counter with his face covered at around 6am on Monday, April 29 .
The man then sprayed a can of liquid at a shop assistant – who managed to duck out of the way.
The shop worker called to a colleague to ring police and the suspect ran off along Wilmot Street away from the Market Place.
No-one was injured during the incident and nothing was stolen.
The suspect was around six feet tall and of slim build. His face was completely covered with a scarf.
Police have reissued the appeal for information in the hope witnesses or anyone who was in the area at the time will come forward.
Officers would still like to speak to a man who was out jogging in the area at the time and asked the shop assistant if she was okay following the incident.
The potential witness or anyone with information is asked to call Amber Valley CID on 101 or Crimestoppers anonymously on 0800 555 111.