This undated photo provided by the Tampa Police Department shows Howell Emanuel Donaldson. Police in Tampa say they have arrested, Donaldson, 24, and will charge him with murder in a string of recent homicides.

This undated photo provided by the Tampa Police Department shows Howell Emanuel Donaldson. Police in Tampa say they have arrested, Donaldson, 24, and will charge him with murder in a string of recent homicides.