Police are appealing for information after a man allegedly exposed himself to woman who was walking her dog at a nature reserve in Doe Lea.
The alleged incident happened between 3pm and 3.30pm on Monday, October 3.
A 44-year-old woman was walking in the park, which is off Stockley Lane, when a man sat on a bench exposed himself to her.
He is described as white, with short blonde hair, and around 5ft 10in. He was wearing a dark coloured t-shirt and black workwear style trousers with a white reflective strip behind the knees.
The man was seen by the woman beforehand jogging in the park.
Anyone with any information should contact PCSO Dave Hancock, quoting reference 16000308016, by calling 101. You can also send him a message online by visiting the Contact Us section of our website at www.derbyshire.police.uk/Contact-Us.
You can also call Crimestoppers anonymously on 0800 555 111.