larry mcnabny had a thriving law practice, a wife he adored and plenty of money. and then a new friend entered the picture and a love triangle took shape. the murder was a whodunit involving three entangled lives. one was hiding a secret identity. but to untangle this mystery police needed to know who was the master mind pulling the strings? here's keith morrison with "poison." >> it was september 11th, 2001, just about everyone knows where they were that awful day. like the glamorous trio that was traveling north through california's yosemite national park, even as the rest of the world's attention was focused on new york city, they were intent on their own urgent need, their desires, their fears, their deadly love triangle. so they probably didn't appreciate the passing wonders, the astonishing cliffs, the water falls, the giant sequoias. here is one of them. his name was larry mcnabney, and he was a tall, handsome man, a well-known and respected attorney from nevada, a personal injury specialist, made buckets of money, loved the big life, loved being in control