mt. carmel. the entire compound is going up right now. >> it was an epic debacle in united states law enforcement history. a deadly shootout followed by a 51-day siege that ended with more than 70 people dead in a raging inferno. all caught on live television with the whole world watching. two questions rise from the ashes of this american tragedy. who shot first and who started the fires? it began innocently enough. in 1935, a small religious group moved to waco. an offshoot of the seven-day adventist church, they eventually called themselves the branch davidians. >> had pretty stable leadership for a lot of years, and they were known in town as a somewhat bizarre but benign religious group that pretty much kept to themselves. >> the davidians bought property about ten miles east of town, built a compound, and named their sanctuary mt. carmel, after the sacred biblical site in israel. but in the early 1980s a new member appeared who would change everything. his given name, vernon wayne howell. h