(11/12/10) The third suspect was caught Friday morning after he emerged from a manhole on I-20 during rush hour after spending the night in the sewer system. Markus Isiah Seymore, 17, also of Atlanta and from the same street as Tron Hill, was arrested and charged with the same charges as the other two suspects, including murder, armed robbery, kidnapping, and aggravated assault. Witnesses began calling dispatchers shortly after 8 a.m., describing a black male with dredlocks that had come out of a manhole in the median of I-20, "like a gopher," just across from the strip mall where GameStop is