On Monday April 17, 2006 at 10:05pm, officers from District 3 responded to 25 Hosmer Street, Mattapan for a person stabbed. Officers located a male victim suffering from an apparent stab wound. The victim was taken to Boston Medical Center and later died. He has been identified as 39-year-old Eric Johnson of Mattapan. The cause of death as determined by the Medical Examiner was a stab wound and the manner of death has been ruled a Homicide.As a result of the investigation that followed, Homicide Detectives obtained an arrest warrant on 5/17/06 for Michael K. Penn, 32, of Dorchester, charging him with the murder of Eric Johnson. Penn remains at-large at this time. Anyone with knowledge of his whereabouts is asked to call the Boston Police at the numbers below. Boston Police Homicide Detectives continue to investigate this incident and ask anyone with information about it to contact the homicide unit at 617-343-4470 or to remain anonymous contact the Crime Stoppers Tip Line at 1-800-494-TIPS.