but the Intelligence Unit still lacked enough evidence to build a case against his brother Al. In March 1930, attorney Frank J. Loesch of the Chicago Crime Commission asked President Herbert Hoover to take down Al Capone, adding additional impetus to the Intelligence Unit's efforts. Tax investigators in Chicago suspected that a large amount of Capone's income came from his interest in a race track for dogs, called the Hawthorne Kennel Club, in Cicero, run by a lawyer named E. J. O'Hare. In May 1930, Irey sent Frank J. Wilson, then 42, to lead the investigation into linking Capone to taxable income through his dealings with O'Hare. From the time Wilson and his agents were put on the case, they examined over 2 million documents and evidence acquired in a number of raids on Capone's establishments over a six-year period. Their strategy was to show that Capone was spending a lot of money which would indicate to a jury that the money had to be coming from somewhere even though he did not have a formal job. Wilson and his men questioned merchants, real estate agents, proprietors, hotel clerks, bartenders, and accountants, many of whom were to afraid of what might happen to them if they gave information away about Capone. Wilson tried to extend some sort of protection to these individuals but they still refused to speak about their business with the gangster. The group of men continued to analyze phone records, investigating banks and credit card agencies. They found informers, seized books and searched for any weak point in Capone's operations. One of the main issues that Wilson and his team faced was that not only did they have to find that Capone was making money, but they also had to find where the money was. Many leads turned up dead because of this, which caused the investigation to become frustrating. Capone himself was very smart about how he moved his money, and how he did business with his numerous establishments which made the investigation harder. However, Wilson was known for being exceptionally thorough and relentless in his search for information. In attempting to find evidence of taxable income received by Capone ally Jake Guzik, Wilson and his agents found that someone going by the name of J.C. Dunbar purchased $300,000 worth of cashier's checks at a bank in Cicero. With help from informant O'Hare, Wilson was able