A wallet containing cash and cards, and two iPhones were stolen after a Markyate shop was broken into.
Police believe Prudens bakery shop on High Street was burgled between 3.30pm and 5pm on Monday, March 20.
They have now released images of a man they believe has information about the incident.
Anyone who knows anything about the man or his whereabouts has been asked to contact Hemel Hempstead police on 101.
Alternatively, they can anonymously get in touch with Crimestoppers on 0800 555 111.
Crimestoppers do not record personal details, and the call cannot be traced or recorded.
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