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.

The Colorado cold case task force created a list of those cases dating back to 1970. The Problem Solvers are working to highlight cold cases in our state.

Who murdered James O’Neal Johnson?

The Denver Police Department said that James O’Neal Johnson, 24, was hanging out with friends, drinking, and listening to music in the 1100 block of 26th Street on May 26, 1999 when he was shot.

He was taken to the hospital where he was pronounced dead.

More than 23 years later, Johnson’s murder remains unsolved. Today would have been Johnson’s 48th birthday.

If you have any information about Johnson’s murder, please contact the Denver Police Department at 720-913-2000. You can also provide an anonymous tip to the Metro Denver Crime Stoppers and be eligible to receive a reward up to $2,000.

Here are some of the other cases we’ve highlighted:

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.