DOUGLAS COUNTY, Colo. — A nearly 40-year-old cold case has been solved in Douglas County, and investigators are pointing to one of the most "prolific serial killers" in Colorado as the culprit.

The Douglas County Sheriff's Office (DCSO) held a press conference on Tuesday morning to announce a major update in the 1987 homicide of 30-year-old Rhonda Marie Fisher.

“Rhonda was a mother, she was a daughter, a sister, a cousin, and a niece," DCSO Sheriff Darren Weekly said. "And her family members have waited nearly four decades for answers.” Rhonda Fisher

Fisher was born in New York on Nov. 12, 1956 and disappeared in March of 1987. She was last seen alive the night before her death walking north on S. Monaco Parkway toward Leetsdale Drive in Denver.

A motorist spotted her nude body down a

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