The Bizarre Tale of Treaty Oak’s Poisoning in Austin

Makenna McDaniel

They say “Keep Austin Weird” but nothing is more bizarre than the story of Treaty Oak. Back in the 1980s, there was an attempted murder that took place. Of a person? Even worse, it is the perfect specimen ever to exist. Treaty Oak. 

Treaty Oak, an over 500-year-old tree, is a historic site in Austin, Texas. In 1927, the American Forestry Association named Treaty Oak the most perfect specimen in North America. A tree so perfect that people from around the United States have to visit it whenever they come to Austin.\

Pictured: Treaty Oak, 1941. (Courtesy of the Austin Public Library)

In 1989, a ghastly sight was seen: dead grass surrounding Austin’s beloved tree. John Giedraitis, Austin’s first city forester, was hosting several state foresters from across the United States when he came upon this frightening sight. While leading a tour of the multiple parks in Austin, Giedraitis proudly took them to Treaty Oak. Upon first glance, the foresters noticed that something alarming was at the roots of Treaty Oak, dead grass. Indicating a problem, after months of further tree deterioration, Giedraitis decided to open a full investigation to save the tree. Giedraitis took samples and sent them to the lab for a test. The results were quick but did not contain happy news… Treaty Oak was being poisoned!

Pictured: ‘Murder Mystery Grips City: Just Who Would Kill a Tree?’ on the front page of The New York Times, 1989.

The poisoning seemed to him as intentional, but who could do such a thing? That is a question that Giedraitis would not rest until he got to the bottom of. Austinites were not the only ones invested in this criminal case but the world. Magazines and news stations started to cover the story. One day, after hearing about the tragedy, H. Ross Perot, a billionaire based in Texas, reached out and offered to pay for the expenses of the investigation. Giedraitis and his foresters began to call every scientist they knew; the local police department took up the case; it was a city-wide effort. In the meantime, several treatments were given to Treaty Oak to save its life.

John Jones, a new detective in the Austin City Police Department, thought this case was a joke but soon found out it was anything but. The Austin Forestry Service offered a $11,000 reward to anyone who knew the culprit.

The news spread so fast that people from all over the world started to call, claiming to know something. No one had any helpful information about the case until Cindy Blanco came forward. Blanco would often ride to a local methadone clinic with a man named Paul Stedman Cullen. Blanco recalled an odd conversation with Cullen, who admitted his love for his counselor, but the love was unrequited. Cullen performed rituals and believed that killing the largest thing would also kill his passion for his counselor. Jones got a search warrant after an incriminating audio recording. Cullen’s home was soon investigated, and a trial began. He was ultimately found guilty and sentenced to 9 years for criminal mischief. Treaty Oak was safe at last!

Exploring O’Henry’s Home: A Trip Through Literary History

This past month, I toured the O’Henry Home. Upon entering, I was greeted by Spike Gillespie, a kind and knowledgeable staff member from the City of Austin’s Museums and Cultural Programs. She shared key details about William Sydney Porter’s life, explaining that he lived in this house from 1884 to 1894 before fleeing to Honduras due to corruption allegations at his workplace, the First National Bank of Austin. A few years later, he returned to the U.S. under an alias—O’Henry—the pen name that would bring him literary fame.

The small home consists of three main rooms: the living room…

…the bedroom…

…and O. Henry’s office.

As I walked through, I enjoyed learning fascinating tidbits about his life and work. His experience drafting maps at the General Land Office in Austin resonated with me, as I’ve encountered the GLO while assisting the Land and Resource Committee in my office.

Although modern technology has replaced hand-drawn maps, I appreciated the small connection I felt while standing in O’Henry’s office.

As I continued walking through the home, I found myself amused with framed sketches located right outside O’Henry’s office. Later, Spike informed me that during his lifetime, O’Henry became a self-taught artist, focusing largely on political cartoons, which were featured in The Rolling Stone magazine. Most of his artwork throughout the home feature a mixture of political cartoons and the life of American settlers.

Spike also shared insights into how his time in Austin shaped his storytelling. Many of his short stories reflect themes of redemption, irony, and human nature, qualities that may have been influenced by his own struggles. His most famous work, “The Gift of the Magi,” showcases his signature twist endings, a style that would make him one of the most celebrated short story writers in American literature.

Beyond his literary contributions, O’Henry’s influence on Austin is still evident. His home, now preserved as a museum, serves as a reminder of the city’s rich cultural history.

Creative writing workshops hosted by individuals like Spike encourage Austinites to expand their writing skills and explore writing techniques utilized by famous writers such as O’Henry.

Visiting the O’ Henry Home provided me with insight that was much greater than a historical tour, it was a glimpse into the life of a man who turned adversities into art, which brought people together. His legacy lives on not only in his stories but also in the continued appreciation of his wit and literary style.