Mullendore Murder Case

Just a few hours after heavily insured millionaire rancher E.C. Mullendore III was found shot in the head, Gary Glanz was called in to provide security for the murdered man’s estranged wife and family amid rumors that it was a mob hit.

Anyone who thinks it’s easy making a living as a private investigator has been watching too much television or reading too many mystery novels. Having watched his competitors come and go for 40 years, Gary Glanz knows that better than anybody. To him, there is only one measure of success in this business, and that is producing results for the client – for every client, every time.

Case Details

Just a few hours after heavily insured millionaire rancher E.C. Mullendore III was found shot in the head, Gary Glanz was called in to provide security for the murdered man’s estranged wife and family amid rumors that it was a mob hit.

Within hours of the murder, Glanz would find himself at the crime scene, the sprawling Cross Bell Ranch in northern Oklahoma, where he established contacts with law enforcement officials and ranch employees. Over time, his role would evolve into a full-scale investigation of the murder, taking him from Kansas City to Atlanta to Seattle to the Bahamas as he tracked down leads.

Eventually, the case would come to be regarded as the biggest unsolved murder in Oklahoma history, attracting the attention of The Wall Street Journal and becoming the subject of a Warner Bros. book. Glanz’s work would lead to an $8 million insurance settlement for the dead man’s family, reportedly the largest in the history of the U.S. underwriting industry, according to Guinness World Records.

Case Gallery

Case Videos

Gary Glanz Interview
Gary Glanz Interview

2017 Gary Glanz Interview

Behind Mansion Doors
Behind Mansion Doors

Behind Mansion Doors Film

Gary Glanz Interview
Gary Glanz Interview

2017 Gary Glanz Interview

Behind Mansion Doors
Behind Mansion Doors

Behind Mansion Doors Film

About The Firm

The Wall Street Journal calls him “The Super Sleuth” —and with good reason. For more than 40 years, Tulsa private investigator Gary Glanz has been solving major crimes, locating missing people, recovering tens of millions of dollars in cash and other valuable materials and securing priceless art collections—all with a flair, and a sense of professionalism and discretion that have earned him an international reputation. Originally making a name for himself as one of the youngest detectives in the history of the Tulsa Police Department, where he received numerous awards and citations, Glanz left the police department in 1967 to establish his own private investigative firm. Gary G...

CONTINUE READING

Famous Cases

An inside look at some of Tulsa’s most notorious cases.
READ THE STORIES Need out help? Get Started