Declaring Themselves as Victors
The police who came to the island stated to the world that there was still no way to escape the island, despite not finding any evidence that the men actually died as they said. The cops weren't trying to find answers, they were trying to shift the blame off of them. This mishandling of information most likely resulted in the convicts' impunity if (or when) they made it to land.
The Letters
Clarence and John's family were sent postcards on every holiday and each individual family member's birthday every year. Mrs. Anglin got an anonymous bouquet in the mail every Mother's Day until she died. Some people think that these postcards were pranks, but most believe that they actually came from Clarence and John...