New soil samples from the Toomer's Corner trees allegedly poisoned by a disgruntled Alabama fan show the herbicide traveled much deeper than originally thought, WTVM in Columbus reports.

As a result, it's looking less likely that Auburn University's historic oaks can be saved.

By the end of April, their new leaves should be big enough to see if they too are infected with the herbicide, Spike 80 DF, the station reported.

Harvey Updyke Jr., 62, was arrested for allegedly poisoning the trees after the Iron Bowl, won by Auburn 28-27. Charged with criminal mischief, Updyke is scheduled to appear in court for a preliminary hearing April 20.

A person calling himself "Al from Dadeville" admitted poisoning the trees in a call to the Paul Finebaum radio show in January. The caller was subsequently determined to be Updyke, police said.