Police are appealing for witnesses after a 17-year-old was sexually assaulted at a park in Stoney Creek earlier this month. Hamilton police say the incident happened on April 3 at around 2 p.m. at Battlefield Park, where an unknown man allegedly approached the teenager and sexually assaulted them. Police describe the suspect as a bald, “overweight” man in his mid-50s, who is five-foot-10 with hairless arms and large lips. They say he was last seen wearing a grey shirt with a red and white logo over the left chest that reads “Stoney Creek Hamilton,” a brown baseball cap with white mesh backing, grey and neon tennis shoes and rectangular sunglasses. Officials say he was seen driving a grey, two-door Dodge RAM pick-up truck. Investigators are asking anyone in the area to check their surveillance dash cam video for relevant footage. Anyone with information is asked to contact investigators are Crime Stoppers anonymously.