continued without being troubled by the Chicago police, but at a lower level and without the open violence that had marked Capone's rule. Organized crime in the city had a lower profile once Prohibition was repealed, already wary of attention after seeing Capone's notoriety bring him down, to the extent that there is a lack of consensus among writers about who was actually in control and who was a figurehead "front boss". Prostitution, labor union racketeering, and gambling became moneymakers for organized crime in the city without incurring serious investigation. In the late 1950s, FBI agents discovered an organization led by Capone's former lieutenants reigning supreme over the Chicago underworld. Some historians have speculated that Capone ordered the 1939 murder of Edward J. O'Hare a week before his release, for helping federal prosecutors convict Capone of tax evasion, though there are other theories for O'Hare's death. Illness and death Due to his failing health, Capone was released from prison on November 16, 1939, and referred to the Johns Hopkins Hospital in Baltimore for the treatment of syphilitic paresis. Because of his unsavory reputation, Johns Hopkins refused to treat him, but Union Memorial Hospital was willing to take him as a patient. Capone was grateful for the compassionate care that he received and donated two Japanese weeping cherry trees to Union Memorial Hospital in 1939. After a few weeks of inpatient and outpatient care, on March 20, 1940, a very sickly Capone left Baltimore and travelled to his mansion in Palm Island, Florida. In 1942, after mass production of penicillin was started in the United States, Capone was one of the first American patients treated by the new drug. Though it was too late for him to reverse the damage to his brain, it did slow down the progression of the disease. In 1946, his physician and a Baltimore psychiatrist examined him and concluded that Capone had the mentality of a 12-year-old child. He spent the last years of his life at his mansion in Palm Island, Florida, spending time with his wife and grandchildren. On January 21, 1947, Capone had a stroke. He regained consciousness and started to improve, but contracted bronchopneumonia. He suffered a cardiac arrest on January 22, and on January 25, surrounded by his family in his home, Capone died after his heart failed as a result of apoplexy. His body was transported back to Chicago a