Share this article Share Although cops won’t say outright they suspect a serial killer, they believe the three murders are linked. A video of a potential person of interest in the first shooting is among the few clues for investigators, who have called in FBI profilers to assist. The first victim, year-old Benjamin Edward Mitchell, was shot on October 9 near a bus stop a block away from the most recent shooting, and died from his injuries at a hospital. Cops said he had no criminal record. Days later, Monica Caridad Hoffa, 32, was found dead on October 13, although police believe she was killed two days earlier. Her body was found in a vacant lot by a city worker.