An FBI agent in Salt Lake City has developed a series of 13 applications that have apparently significantly streamlined these sorts of investigations.
From the story:
"Since the software was approved by the FBI last fall, it has helped save at least 45 children and led to 330 searches and more than 220 arrests, according to the National Center for Missing & Exploited Children. In May, the center gave FBI Special Agent Eric Zimmerman an award for his contributions in fighting child sex crimes."
But he grew old, this knight so bold / And upon his heart a shadow / Fell as he found / No spot on the ground / That looked like El Dorado.