DENVER (KDVR) — There are hundreds of unsolved homicide cases, long-term missing person cases, and unidentified remains cases in Colorado where at least three years have passed since the crime happened.
What happened to Mark Bonner?
Mark Bonner was last seen in Boulder on March 20, 1978. He has not been seen since then.
Bonner is described as:
- 6 feet 3 inches tall
- 150 pounds
- Blue eyes
- Blond/strawberry blond hair
Bonner would be 68-years-old in 2022.
Police said foul play is suspected in Bonner’s disappearance.
If you have any information, please contact the Boulder County Sheriff’s Office at 303-441-3600.
Here are some of the other cases we’ve highlighted:
- Cold case: Who kidnapped Christopher Abeyta 35 years ago?
- Cold case: Who killed JonBenét Ramsey 25 years ago?
- Cold case: Who killed Jessica Bejarano 15 years ago
- Cold case: Where is Terri Ackerman?
- Cold case: Who killed Richard Elliott at a grocery store 23 years ago?
- ‘Don’t ever give up hope’: Cold case: Who killed Edward Steinbach?
- Cold Case: Who killed Denise Davenport 37 years ago?
- Cold case: Who murdered James O’Neal Johnson 23 years ago?
- Cold case: Where is Jennifer Lynn Marcum?
- 18 people remain unidentified in Denver since 1970
If you ever have a cold case you would like us to feature, please fill out this form:
The National Missing and Unidentified Persons System shows there are currently 21,556 open missing persons cases in the United States and over 300 in Colorado.