At around 8.30pm on Thursday, April 19, a shopper in Tesco Hatfield Extra accidentally left his mobile phone at an express checkout.
Someone then picked up the phone and left with it.
Officers would like to speak to the man pictured as part of their enquires.
At around 8.30pm on Thursday, April 19, a shopper in Tesco Hatfield Extra in Oldings Corner accidentally left his mobile phone at the express checkout.
His phone was then picked up by another person who put it in his pocket and left the store without handing it in to staff at Tesco.
Police would like to speak to the man pictured, who had a dog with him, as he may have information that could assist the investigation.
Anyone who recognises him or has information that could assist the on-going investigation is asked to contact PC Balal Miah by emailing balal.miah@herts.pnn.police.uk, call the non-emergency number 101, quoting crime reference B2/18/1718 or report information online at www.herts.police.uk/report.
Alternatively, you can contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or through their Anonymous Online Form at www.crimestoppers-uk.org. No personal details are taken, information cannot be traced or recorded and you will never need to go to court.