PHOENIX (AP) -- A would-be bar owner angry at being denied a liquor license threatened to shoot people at the Super Bowl and drove to within sight of the stadium with a rifle and 200 rounds of ammunition before changing his mind, federal authorities said.

Kurt William Havelock, who ultimately turned himself in, had vowed to "shed the blood of the innocent" in a manifesto mailed Sunday to media outlets, according to court documents. "No one destroys my dream," he wrote.

The documents say he was armed with an AR-15 assault-style rifle Sunday when he reached a parking lot near University of Phoenix Stadium in Glendale, where pre-game activities were happening.

"He waited about a minute and decided he couldn't do this," FBI agent Philip Thorlin testified at a detention hearing for Havelock on Tuesday.