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Diane MacArthur Brown

Diane MacArthur Brown has been in-house counsel for large corporations, assistant district attorney for many years in Manhattan, deputy attorney general in Colorado, and most recently trial attorney at the Olsen Firm. She graduated from the Detroit College of Law in 1977, ninth in a class of 265, was selected for law journal and won the school’s criminal law award. She went to work as in-house counsel at Centel Corporation and later Citicorp. In March 1981, she joined the staff of New York District Attorney Robert Morgenthau and worked as an assistant district attorney in Manhattan.

During a prosecutorial career in Manhattan that spanned more than six years, Ms. Brown worked in the Office of the Special Narcotics Prosecutor (an arm of all five boroughs) prosecuting narcotics offenses including multi-national conspiracies. She also was assigned to the Rackets Bureau, which investigated and prosecuted organized crimes. Ms. Brown was a courtroom deputy in Manhattan with special expertise in wiretaps, narcotics offenses, and organized crime. She worked in conjunction with DEA, FBI, and international law enforcement agencies, until she moved to Colorado in June 1987. Thereafter, she became a deputy attorney general in the Superfund enforcement section of the Colorado Attorney General’s Office, and then joined the Olsen Firm as a trial attorney.

Ms. Brown was born October 31, 1950 in Chicago, is presently 66 years old, and has been practicing law for 39 years. She graduated from Michigan State University in 1973 with a bachelor of arts degree. Her corporate legal experience included a broad range of issues and cases, including discrimination and governmental regulation matters. Her prosecutorial experience included daily work with grand juries, undercover investigations, wiretaps, and international authorities. Investigations and indictments included multi-national, multi-language intercepted communications, search warrants, and prosecutions. She worked with grand juries on certain crimes in Manhattan, including the December 1985 “Sparks Steakhouse” hit murders of Paul “Big Paulie” Castellano and his driver, Thomas Billotti, in which their assassins blocked off a section of East Forty-Sixth Street during the Christmas shopping rush. Castellano was the head of the Gambino Crime Family, and the ensuing grand jury investigation implicated John Gotti.

As a trial attorney and former prosecutor, Ms. Brown has espoused the view that litigation can be a truth-seeking function and a means toward applied justice in society, whether that justice is being sought by individuals or corporations. Jurors see things that judges miss, and juries bring a commonsense intelligence that will discern the truth in any fact pattern if the lawyers have the appropriate skills and are doing their jobs.

Ms. Brown’s trial skills emphasize cross-examination techniques and closings. Her investigative skills emphasize unearthing evidence that is hard to find and witnesses who are reluctant to get involved. She discerns trends and patterns in complex evidentiary matters. She is a particular critic of government bureaucracy and regulation that hampers entrepreneurial enterprise and success. Her advice to corporations and their executives has been important to their accomplishments, in litigation and otherwise.

Ms. Brown was licensed in Illinois in 1977, in New York in 1981, and in Colorado in 1987. She is admitted to practice before many courts, including the United States Supreme Court. Ms. Brown is a persuasive litigator with an intensive background in trial strategies and skills. Courtesy is a hallmark of her personal style and professional practice.

Ms. Brown’s work has resulted in or contributed to difficult civil settlements, arbitration awards, and multi-million dollar jury verdicts, including a $10.3 million verdict in the United States District Court for the District of Colorado and a $2.58 million verdict in the United States District Court for the Southern District of New York (Manhattan). She is also known for her work in charitable organizations, is a clothing designer and has owned her own clothing company in the United States. She has attended the Fashion Institute of Technology in New York, the University of Colorado, and Colorado State University. She has studied French and Italian, traveling extensively abroad on legal, personal and business matters. She has a daughter, Jane, who is a veterinarian technician.


Attorneys in General Practice, with Emphasis Upon Litigation