Gene Estes implored his son, Shayn, to go to the emergency room that day, fearful he was having another reaction to his psychiatric medication. Shayn was forgetful, dropping things throughout the day, combative and disoriented during simple conversations. “I wanted him to see any doctor available,” Estes said. Gene was worried the dosage was off again. But Shayn, 33, brushed off his father’s concerns as an overreaction. He jumped out of the car after the two argued at the post office and took off walking the six blocks to his Crested Butte apartmentThat was the last time the father would see his son alive. He found Shayn the next morning,...