DENVER (KDVR) — Ten-year-old Robert “Bobby” Bizup went missing in Estes Park almost 65 years ago this August. While his remains were found inside the park the year after he went missing, the investigation is still open.

In August 1958, Bizup went missing from Camp St. Malo in Estes Park, which is across from Rocky Mountain National Park, according to the National Park Services Investigative Services Branch.

During the initial search, military personnel, local police, the NPS and other resources scoured the grounds of the park but Bizup was nowhere to be seen.

In 1959, his remains were found within park boundaries in a location where investigators had previously searched at the time of his disappearance.

The cause and nature of Bizup’s death were never definitively determined and the circumstances behind his disappearance remain unsolved.

If you or someone you know has any information on the case, a tip to aid in the investigation or report something suspicious in any National Park Service Site, contact the NPS tip line.

Investigating cold cases

“Their voices may now be silent . . . those who may know the truth are not,” the Colorado Bureau of Investigation shared as a part of its mission as it works to bring justice to cold case tragedies.

There are hundreds of unsolved homicides, long-term missing persons and unidentified remains cases in Colorado where at least three years have passed since the crime happened. The Problem Solvers are working to highlight a cold case in the state each week.

If you ever have a cold case you would like us to feature, please fill out this form or send an email to –