Mark Magee walked into the Trump Taj Mahal Casino Resort last year with a grudge and a gun. He believed the casino - like the 10 others in Atlantic City - cheats gamblers by electronically manipulating the outcome of table games like roulette and craps. And because of that, he felt, someone needed to die. Monday morning, Magee admitted in court that he fatally shot Ray Kot, a veteran shift manager at the Taj Mahal, whom he knew from regularly gambling there.