in the eyes of his daughter, randy baker could do no wrong. he was her rock and a mentor for countless others. randy dedicated himself to a deeply personal mission, counseling others to overcome addiction. it was a battle he, too, waged as a young man. so when randy was found dead, investigators wondered, did someone from his past put an end to his future? or was there trouble closer to home? here is keith morrison with "the secret keepers." >> reporter: it was a warm colorado morning on the ripe side of summer. the road beneath his wheels, the vast blue canopy above, renewed possibilities in his heart. randy baker, recovering heart patient, cruised through the sun to the job he loved. better now. back to sweet routine. so why this morning fatigue? randy felt the warm day wrap his big body like a sleeping pill. he struggled to lift his leaden eyelids. so tired, so tired. >> what was told to me was that he probably fell asleep and swerved. >> reporter: it could have been catastrophic. it wasn't. his pontiac took a ding. but the cops who responde