It seems like now even Josh is starting to play himself as a victim.

Ponzi's rapid rise naturally drew suspicion. When a Boston financial writer suggested there was no way Ponzi could legally deliver such high returns in a short period of time, Ponzi sued for libel and won $500,000 in damages. As libel law in those days placed the burden of proof on the writer and the paper, this effectively neutralized any serious probes into his dealings for some time.

On July 24, 1920, the Boston Post printed a favorable article on Ponzi and his scheme that brought in investors faster than ever. At that time, Ponzi was making $250,000 a day. Ponzi's good fortune was increased by the fact that just below this favorable article, which seemed to imply that Ponzi was indeed returning 50% return on investment after only 45 days, was a bank advertisement that stated that the bank was paying 5% returns annually. The next business day after this article was published, Ponzi arrived at his office to find thousands of Bostonians waiting to give him their money.

The stories caused a panic run on the Securities Exchange Company. Ponzi paid out $2 million in three days to a wild crowd outside his office. He canvassed the crowd, passed out coffee and donuts, and cheerfully told them they had nothing to worry about. Many changed their minds and left their money with him. However, this attracted the attention of Daniel Gallagher, the United States Attorney for the District of Massachusetts. Gallagher commissioned Edwin Pride to audit the Securities Exchange Company's books—an effort made difficult by the fact his bookkeeping system consisted merely of index cards with investors' names.

On August 11, it all came crashing down for Ponzi. First, the Post came out with a front-page story about his activities in Montreal 13 years earlier—including his forgery conviction and his role at Zarossi's scandal-ridden bank.