the prosecution's next witness might shed some light. tom's former karate instructor. 15 years earlier, tom had been on his way to earning a black belt. >> what moves or kicks or holds would he know? >> anywhere's between 15 and 25 different kicks. >> it would take just one of those kicks to knock juanita off balance and off that cliff. >> no further questions. >> after five weeks of testimony, the state rested. now it was tom richardson's turn to explain why he wasn't lying, and how three different stories could all be true. coming up -- what happened that day at pictured rocks? >> this is going to be difficult. >> tom's own chilling explanation. copd makes it hard to breathe, so i wasn't playing much of a role in my own life, but with advair, i'm breathing better