dan harris first investigated the fatalities and this suspect for "nightline" in october and he's got tonight's report. >> reporter: it is a stunning fall from grace for a man who was once one of the fastest rising stars in the $11 billion a year self-help industry. one of the featured teachers in the megabest selling book and dvd "the secret." >> most people look at their current state of affairs and say, this is who i am. that's not who you are. >> reporter: which argue you can get whatever you want through the power of your thoughts. a guru who tonight is in jail, facing three charges of manslaughter. the arrest today of james arthur ray is a culmination of a nearly four-month investigation as to what happened at this makeshift structure, known as a sweat lodge, traditionally used as part of a native american say motherny. >> this is a result of a shooting? >> no, a sweat lodge. >> a sweat lodge? >> yes. >> okay. >> reporter: ray was guiding one of those ceremonies here in arizona when three people died and 18 others were rushed to the hospital. one of the victims were liz newman,