Private Investigator Claims Links Between Man Who Killed Himself And JonBenet Ramsey's Murder

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

More than 20 years after the killing of six-year-old JonBenet Ramsey, a private investigator once hired by her family says a man who lived nearby may have played a part in her death.

Ollie Gray, who now suffers from Parkinson's disease, continues probing the child's murder on his own time. 

Read: Where Are The Players In The JonBenet Ramsey Case Now?

A 26-year-old man who lived nearby may have had something to do with the grisly slaying, he says.

"I think that there's something there," Gray told INSIDE EDITION. 

Michael Helgoth lived a few miles from the Ramsey home in Boulder, Colorado, and shot himself to death less than two months after the girl's death.

Helgoth's death may not have been a suicide, he says. "I think it's worth following up on," he said.

Read: Horror Homes for Sale

Gray said he obtained a pair of boots once worn by Helgoth, its footprint is similar to one found in the Ramsey basement, where JonBenet's body was found.

A Helgoth family member said relatives do not believe he killed JonBenet. 

The Boulder Police Department said the case is being investigated.

Watch: Teen Beauty Queen Suffers Seizure But Finishes The Pageant