FBI and IRS agents Tuesday seized boxloads of evidence that could determine whether the Ukrainian oligarch, Igor Kolomoisky, laundered millions of dollars through Cleveland real estate. A long-running investigation into Kolomoisky went public for the first time when agents searched the offices of Optima Management Group in One Cleveland Center at East 9th Street and St. Clair Avenue. Agents in Miami also searched a business there involving the company. Authorities in Cleveland told The Plain Dealer and Cleveland.com last year that authorities have been involved in a wide-ranging investigation involving Kolomoisky, whom one analyst called one of Ukraine’s most controversial...