Police in Philadelphia are asking for help in catching someone who robbed and beat a deaf many last week. The 37-year-old man was riding his bike near the intersection of Germantown Avenue and Walnut Lane when he was knocked off his bike and assaulted. The assailant took everything the man had on him--phone, wallet, work ID and even the bike itself. The deaf man was treated for injuries. Police are looking for a young black man with a medium build and wearing a red t-shirt with dark jeans. If you have information about the crime, authorities ask you to contact the Northwest Detectives Division at 215-686-3353/3354. Below is a surveillance video.