Boulder County prosecutors Katharina Booth, left, and Amy Okubo, dubbed by Scott Kimball as "the Boulder bitches," pose in Courtroom Q at the Boulder County Justice Center. (Marty Caivano / Camera)

Boulder County prosecutors Katharina Booth, left, and Amy Okubo, dubbed by Scott Kimball as "the Boulder bitches," pose in Courtroom Q at the Boulder County Justice Center. (Marty Caivano / Camera)

Boulder County prosecutors Amy Okubo and Katharina Booth, assigned to the Lafayette check-fraud case against Scott Kimball, meet with the U.S. Attorney’s Office and the FBI in Denver, asking for a wider investigation.

Lafayette police Detective Gary Thatcher had found out about Kaysi McLeod’s disappearance, and had also been told by FBI Special Agent Carle Schlaff that Kimball might be connected to the disappearance of Jennifer Marcum.

But neither federal agency launched a missing-persons probe.

With no bodies and no witnesses, Booth and Okubo knew they had no murder case against Kimball. They homed in on the fraud case, planning to use Kimball’s six previous felony convictions to paint him as a habitual offender, allowing for a quadrupling of prison time if convicted of stealing $55,000 from Lafayette optometrist Cleve Armstrong.

Realizing that he wouldn’t easily shake this pair, Kimball came up with a nickname that the prosecutors came to wear as a badge of honor: the Boulder bitches.

“He realized that Katharina and I were not going away,” Okubo recalls. “The Boulder bitches weren’t going away.”