HOUSTON (KTRK) -- Houston police have released a new sketch of a suspect wanted in the stabbing death of a man at a METRO bus stop in northwest Houston back in January.It happened in the 2200 block of Gessner and Hammerly around 7pm on January 11.The suspect is described only as a Hispanic male, 20 to 30 years old, 5 feet 9 inches to 6 feet tall, with an average build. He was last seen wearing a black hooded sweater with blue jeans. The suspect also appeared to have acne scarring on his face along with shoulder-length wavy black hair.Police say Frederick Williams, 53, of Houston, and the suspect began arguing. During the argument, the suspect produced a knife and stabbed Williams. The suspect then fled on foot westbound on Hammerly. He was seen going into a nearby townhouse complex.Police say a bystander found Williams on the ground and soon realized he had been stabbed. Williams was sent to Ben Taub General Hospital where he died.Police recovered the knife.So far no arrests have been made.Anyone with information on the suspect in this case is urged to contact the HPD Homicide Division at 713-308-3600 or Crime Stoppers at 713-222-TIPS.