Deadly Night Shades

Ken Smart was the new rookie on the beat on Isla Verdante. Big City wasn't equal to it's name, but it was an average medium-sized town type of place for the Caribbean Islands.
Capt. "Handy" O'Connel seemed to take an instant dislike to Ken. He didn't know why.
Ken's father had been a good cop, in the states. Chicago. Twenty five years. He had retired, and had died a year later. Ken always thought he had willed himself to die. He didn't feel he had a purpose anymore. Ken had learned to love/hate the career, but was deter-mined to keep up the family tradition. His grandfather was a cop.
Ken got assigned to the graveyard shift. He would prove his mettle or get bounced.
He was determined. All he needed was some kind of anchor for his determination.
He found it the second night on duty: a killer who had been around for sixteen years. He killed every six months. Ken found his thirty fourth victim.
Could he find this killer?