Capone had previously housed his headquarters at the nearby Metropole Hotel in Chicago, but in July 1928 moved to a suite at the Lexington Hotel, also in Chicago. Capone ran his various enterprises from this hotel until his arrest in 1931. A construction company in the 1980s planned a renovation of the Lexington Hotel and while surveying the building discovered a shooting range and a series of secret tunnels including one hidden behind Capone's medicine cabinet. These tunnels connected taverns and brothels to provide an elaborate potential escape route in case of a police raid. These discoveries led to further investigation of the hotel, notably by researcher Harold Rubin. Rumors said Capone had kept a very secret vault beneath the hotel to hold some of his wealth.