Unknown (narrator or host)

Victim number five, however, is not.

Kathy is 21-year-old Catherine Bright.

Four years earlier, Bright was found in her home bound and stabbed 11 times.

The murder's M.O.

fits BTK.

With the letter to cake, BTK generates the attention and the fear he needs.

For the next year, however, the killer goes quiet with no bodies, phone calls, or letters.

In 1982, eight years after the first BTK murder, Wichita forms a special unit to reinvestigate the seven victims.

Detective Jerry Harper is part of the unit.

The team returns to the evidence files and begins to search, earning themselves a nickname, the Ghostbusters.

Their secret weapon is the newly developed technology of DNA, led by Dr. Stephan Brady.

The Ghostbusters send biological evidence from two BTK cases to one of the few labs in the world doing forensic DNA testing.

The BTK profile is one of the first ever developed in a homicide investigation in the United States.

Unfortunately, it is also of limited value to detectives.

Ken Landwehr is the youngest member of the Ghostbusters.

For more than four years, he helps to develop hundreds of leads, but never makes an arrest.

With no solid suspects to offer, the Ghostbusters are eventually disbanded, and most of Wichita believes they have seen the last of BTK.

Most of Wichita, however, is wrong.

On March 24, 2004, local news station Cake TV leads its broadcast with a bombshell.

After more than 25 years in apparent slumber, the monster known as BTK has awakened.