OPELIKA, Ala. -- A University of Alabama fan accused of poisoning Auburn University's landmark oak trees in a fit of football rivalry voluntarily surrendered for psychiatric testing at a state mental facility Thursday, likely delaying his trial yet again.

Prosecutors had asked the judge to revoke Harvey Updyke's bond following his arrest earlier this month during a dispute at a store in Hammond, La., and a judge issued an arrest warrant Wednesday.

But with a Hammond police officer in court ready to testify about what happened in a confrontation at a home improvement store, Updyke's lawyers skipped a formal bond hearing and instead said their client would turn himself in for testing at Taylor Hardin Secure Medical Facility, a state-run institution in Tuscaloosa.

Mental evaluations can take weeks, a court official said, but Lee County Circuit Judge Jacob A. Walker III didn't immediately rule on a defense request to delay the trial, which is set for a court session that begins Monday.