160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Police have arrested one of the men wanted for a brutal park stabbing that left a 33-year-old homeless man dead, authorities said today. Quinn Marez, 18, of Northridge, was spotted last night exiting a bus in West Los Angeles about 10 p.m., said Detective Mike Fesperman, of the Los Angeles Police Department’s Devonshire Division. “We had suspicion he was in the area,” Fesperman said. “He tried to run away but he was taken into custody.” The other man wanted in the stabbing death of Daniel Edward Koch is Justin Thalheimer, 18, of Northridge. Thalheimer is still being sought, Fesperman said. The men are accused of stabbing Koch after an argument at Limekiln Canyon Park on Aug. 25 or 26. The three men apparently knew one another and had been drinking when an argument broke out, police said. Koch was found face down in a creek. Described by his family as a free spirit engaged on a “Mystery Tour,” Koch graduated from Alemany High School in Mission Hills and studied art at California State University, Northridge.