"My main objective is to help authorities develop a defense," Mr. Falciani said.
He has published "myth-busting guidance" to help authorities sort out their confusion.
And, if the phones had global-positioning chips in them, they could help authorities track a child's whereabouts.
Cameras, he said, can deter would-be terrorists and help authorities more quickly identify a suspect, as underscored in Boston.
Colvin tried to score confidence points by saying the laws could help authorities target those who "illegally" download content.
In addition to raising consumer awareness, they hope their method can help authorities like the F.D.A. and the similar agency in Australia develop regulations for traditional Chinese medicine.
"It is a powerful tool that will help authorities around the world locate and arrest him," Interpol's secretary general, Ronald K. Noble, said in a statement.
Now, along with witness intimidation and distrust of the police, that threat of retribution is why fewer people step forward to help authorities.
Better accountability mechanisms would help authorities investigate the growing cooperation among organized crime networks in the illegal trade of drugs, timber, money and arms.
It's unclear if the company will be able to help authorities intercept data on when they use WhatsApp or with whom they communicate.
In Vernon, Connecticut, police sergeant Timothy O'Connor said officers executed a search warrant at Christopher Krumm's last known address Friday to help authorities in Casper.
