"That month, federal officials disclosed that Smith admitted to parking $200 million in offshore accounts and criminally evaded paying taxes on it for 15 years—from 2000 through 2015. Smith entered into a non-prosecution agreement with the Department of Justice and agreed to pay $139 million in penalties to the IRS—the largest tax fine ever. He also agreed to help the IRS reel in Texas-based billionaire Robert Brockman, Smith’s former client at Goldman Sachs and reportedly the initial investor in his Vista Equity private equity firm. Brockman was charged in October with hiding $2 billion from tax officials in offshore accounts, perhaps the largest tax evasion scheme in history."
What does 'reel in' mean here? Does it mean 'to investigate', or 'to arrest'?