(Bloomberg) -- The federal prosecutor who helped bring down “Pharma Bro” Martin Shkreli and is leading the Brooklyn U.S. attorney’s case against two former Goldman Sachs Group Inc. bankers and Malaysian financier Jho Low has been tapped as the office’s acting chief of the Criminal Division.

Jacquelyn Kasulis succeeds Seth DuCharme, who will join Attorney General William Barr’s staff, the U.S attorney in Brooklyn, Richard Donoghue, said in a statement Monday.

DuCharme is a former deputy U.S. marshal who joined the office in 2008 after attending Fordham University School of Law and clerking for U.S. District Judge Richard Owen in Manhattan. He has served in a series of units in the Brooklyn prosecutor’s office, including General Crimes, Violent Crimes and Terrorism as well as National Security and Cybercrime.

Kasulis, a formidable presence in the courtroom, is a graduate of Davidson College and Columbia Law School. She joined the office in 2008, handling organized crime and gang cases and serving as chief of the Business and Securities Fraud section since March 2017.

While Shkreli once derided Kasulis and her colleagues in the office as “the junior varsity” during his 2017 trial, the veteran federal prosecutor has handled a myriad of complex securities fraud cases. She has led the government’s case against 10 defendants and six corporations in the largest offshore securities fraud, money-laundering and tax evasion case ever brought by the U.S. -- the 1MDB case involving the former Goldman bankers. She’s also led the prosecution of five brokers for their role in a $131 million market-manipulation scheme.

Mark Lesko, a former supervisor of the Town of Brookhaven in Long Island, New York, has been named Donoghue’s chief assistant, according to a statement. Lesko, who was an assistant U.S. attorney in the office from 2002 to 2009, previously served as chief of the Criminal Division in the U.S. attorney’s Long Island office.

Lesko succeeds Bridget Rohde, who served as the acting U.S. attorney for the Eastern District of New York from March 2017 through January 2018, when she was named Donoghue’s chief assistant. Rohde, a prosecutor in the office for 17 years, serving as chief of the Criminal Division and deputy chief of Organized Crime, will become special counsel to the U.S. attorney.

To contact the reporter on this story: Patricia Hurtado in Federal Court in Manhattan at pathurtado@bloomberg.net

To contact the editors responsible for this story: David Glovin at dglovin@bloomberg.net, Peter Jeffrey

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