Now, after spending millions of dollars, a 20-person investigative team has been reduced to one, says Jensen, who works for the King County Sheriff's office. After that, the likelihood of solving a case goes down. Remnants and loose ends of Jensen's investigation fill 300 three-ring binders kept in a small storeroom. It's still a full-time job, but when the phone rings and callers offer occasional tips, the suggestions strike Jensen as tenuous at best. Loose ends and unsolved murders are just a fact of life.
Serial murders are no different.
Levin estimates 20 different serial killers may be responsible for about 200 deaths each year in the United States. Of those, only 10 are brought to justice. Others say the numbers reach much higher. The FBI claims that between 30 to 50 people a year are responsible for hundreds of deaths each year. Nevertheless, tenacity sometimes pays off.