Well, it would be the DOJ who keeps those crime stats. FBI would get their info from there, as they would not have first access to any but federal investigations where they've been called in. And even that set would not necessarily include other federal agencies, such as DEA, ATF and others.
The DOJ would not have stats on all missing children because not all missing child cases involve crime. Most often, it's a juvenile who runs away on their own free will. Very often it's a parent who's involved in family courts and who sees the handwriting on the wall and decides to git while the gittin's good.
But there are some classes of data that no agency keeps track of and which I find completely incomprehensible. For instance, OSHA keeps stats on job related injuries and deaths among law enforcement officers. But no one keeps track of shootings, assaults or use of unneccesary force by police against others. If you want to estimate those numbers, you just have to pour through newspaper archives and websites and know that you're only hearing about those incidents where the media picked up the story or interested parties were willing and able to put it out on the net.
Ardent advocates of prohibition were obsessed by a zeal that bordered on fanaticism. They supported politicians who voted to outlaw liquor, no matter how much of it they privately consumed, and spurned politicians who voted against prohibition, no matter how sober they were personally.
http://www.ncpoliticalreview.com/1101/Ervin/cohen.htm' target='_new'>Sen. Sam Ervin, Preserving The Constitution
