Sightings
To add to the postcard debacle, there was a famous "sighting" of Clarence and John in an anonymous photograph that was taken in Brazil. A former associate of Frank Lee Morris reported running into him in Maryland. While there is no way to prove that the men in this picture are John and Clarence Anglin, we don't think that it's impossible that they are them.
Taking the Bait
The FBI followed these leads until they dried up. They gave out aged figure drawings of the three men to every police force in America in hopes that they would turn up in some capacity. The case ran cold. At least, it was cold until some new developments were brought up in 2013...